# Referral Plug

> Referral Plug is an independent UK editorial site that publishes verified refer-a-friend referral codes (across energy, banking, fintech, mobile and more), personally tested by founder Seb Place.

- Author: Seb Place (personal finance writer, UK consumer savings specialist, Referral Plug founder)
- Focus: UK referral codes, refer-a-friend schemes, cost-of-living deals
- Updated: referral rewards last verified August 2026; each page shows its own last-tested date

## Key Pages
- [Octopus Energy savings calculator](https://www.referralplug.co.uk/tools/octopus-energy-savings-calculator): regional Ofgem price cap rates (1 July to 30 September 2026) vs Octopus Flexible, plus the £50 referral credit (rates refreshed each build)
- [UK energy refer-a-friend league table, CSV](https://www.referralplug.co.uk/data/uk-energy-refer-a-friend-league-table-2026.csv): original research, one row per supplier with reward, payment form, timing, caps and the source URL each figure was read from
- [Best UK referral codes](https://www.referralplug.co.uk/best-uk-referral-codes): compare all UK referral codes side by side (updated regularly)
- [UK voucher codes](https://www.referralplug.co.uk/voucher-codes): voucher and discount codes (most brands we cover run no public discount codes; a few do, with last-checked dates)
- [What is a referral code?](https://www.referralplug.co.uk/what-is-a-referral-code): how referral codes work in the UK (complete guide)
- [About Referral Plug](https://www.referralplug.co.uk/about): who runs the site, and its editorial standards
- [Methodology](https://www.referralplug.co.uk/methodology): how Referral Plug tests every referral code (full process)

## Referral Code Pages
- [Monzo referral code](https://www.referralplug.co.uk/referral/monzo): £20, £50, or £100 (random); link: https://join.monzo.com/c/mmnqtnw
- [Yonder referral code](https://www.referralplug.co.uk/referral/yonder): Up to 20,000 bonus points + £10 off + 2 months free (Full); link: https://join.yondercard.com/zw4fzgn
- [Octopus Energy referral code](https://www.referralplug.co.uk/referral/octopus-energy): £50 account credit; link: https://share.octopus.energy/ruby-snail-729
- [E.ON Next referral code](https://www.referralplug.co.uk/referral/eon-next): £50 retail voucher; link: https://mention-me.com/m/ol/dn9zr-seb-place
- [EDF referral code](https://www.referralplug.co.uk/referral/edf): £50 in bill credit; link: https://www.edfenergy.com/quote/refer-a-friend/absurd-salt-5465
- [Starling Bank referral code](https://www.referralplug.co.uk/referral/starling): £25 (added to a Space) (paused)
- [InvestEngine referral code](https://www.referralplug.co.uk/referral/investengine): Bonus worth £20–£200 (randomly generated); link: https://investengine.com/referral/u/efx19q/
- [Zilch referral code](https://www.referralplug.co.uk/referral/zilch): £5 in Zilch rewards; link: https://zilch.onelink.me/x8EV/8gurm5u5
- [Motorway referral code](https://www.referralplug.co.uk/referral/motorway): £50 Amazon gift card; link: https://motorway.mention-me.com/m/ol/in7nx-seb-place
- [VOXI referral code](https://www.referralplug.co.uk/referral/voxi): Amazon, PayPal, or Just Eat voucher up to £40 (doubled until 7 Oct 2026); link: https://join.voxi.co.uk/ariolam-7
- [giffgaff referral code](https://www.referralplug.co.uk/referral/giffgaff): £10 in giffgaff credit (£5 from 1 September 2026); link: https://www.giffgaff.com/orders/affiliate/mariaplace
- [Freetrade referral code](https://www.referralplug.co.uk/referral/freetrade): Free share worth £10–£100; link: https://magic.freetrade.io/join/sebastian/9f6a1e93
- [Ledger referral code](https://www.referralplug.co.uk/referral/ledger): $5 to $20 in Bitcoin, depending on the device; link: https://shop.ledger.com/?referral_code=YNZ0CKPZFQZ99
- [Tide referral code](https://www.referralplug.co.uk/referral/tide): £100 account credit; link: https://www.tide.co/refer-a-friend/?referralCode=JOPOQW
- [Bitrefill referral code](https://www.referralplug.co.uk/referral/bitrefill): $5 in Bitcoin; link: https://www.bitrefill.com/invite/uuvvs1fo
- [Surfshark referral code](https://www.referralplug.co.uk/referral/surfshark): 1 free month on the 1-month plan, or 3 free months on the 12 or 24-month plan; link: https://surfshark.club/friend/PGZqqYUx
- [Proton referral code](https://www.referralplug.co.uk/referral/proton): $20 off your first paid plan (Mail, VPN, Drive, Pass or the full suite); link: https://pr.tn/ref/CQ85852V
- [THE OUT referral code](https://www.referralplug.co.uk/referral/the-out): £50 off first booking; link: https://www.theout.com/refer; code: CI311
- [BA Amex referral code](https://www.referralplug.co.uk/referral/amex): 6,000 Avios points; link: https://americanexpress.com/en-gb/referral/ba-classic-credit?ref=sEBAsPDn5S&XL=MIANS
- [Incard referral code](https://www.referralplug.co.uk/referral/incard): Boosted 2x cashback for 60 days + fast-tracked review; link: https://app.incard.com/r/qgAnTA
- [TopCashback referral code](https://www.referralplug.co.uk/referral/topcashback): £10 sign-up bonus; link: https://www.topcashback.co.uk/ref/member8136628296205
- [Quidco referral code](https://www.referralplug.co.uk/referral/quidco): £10 bonus; link: https://quidco.com/raf/re7cea9bca1c0e044f0ff9202/
- [Hyperoptic referral code](https://www.referralplug.co.uk/referral/hyperoptic): An Amazon, Tesco or John Lewis voucher worth £25, £40, £50 or £75, set by speed and contract length; link: https://refer.hyperoptic.com/sebastianp-1864; code: 11ZP5SJ
- [Quickline referral code](https://www.referralplug.co.uk/referral/quickline): £100; link: https://refer.quickline.co.uk/sebastianp-1856
- [toob referral code](https://www.referralplug.co.uk/referral/toob): £25 gift card; link: https://rewards.toob.co.uk/sebp-37
- [Airband referral code](https://www.referralplug.co.uk/referral/airband): £50; link: https://aklam.io/ltDSoN2u
- [Zzoomm referral code](https://www.referralplug.co.uk/referral/zzoomm): £75 in cash; link: https://aklam.io/o3nGjebp
- [Affordable Mobiles referral code](https://www.referralplug.co.uk/referral/affordable-mobiles): Up to £60 cashback (paused)

## Categories
- [Banking & Finance referral codes](https://www.referralplug.co.uk/referral/category/banking): Monzo, Yonder, Zilch, Tide, BA Amex, Incard
- [Energy referral codes](https://www.referralplug.co.uk/referral/category/energy): Octopus Energy, E.ON Next, EDF
- [Broadband referral codes](https://www.referralplug.co.uk/referral/category/broadband): Hyperoptic, Quickline, toob, Airband, Zzoomm
- [Mobile referral codes](https://www.referralplug.co.uk/referral/category/mobile): VOXI, giffgaff
- [Cashback referral codes](https://www.referralplug.co.uk/referral/category/cashback): TopCashback, Quidco
- [Trading & Crypto referral codes](https://www.referralplug.co.uk/referral/category/trading): InvestEngine, Freetrade, Ledger, Bitrefill
- [VPN referral codes](https://www.referralplug.co.uk/referral/category/vpn): Surfshark
- [Privacy tools referral codes](https://www.referralplug.co.uk/referral/category/privacy-tools): Proton
- [Car referral codes](https://www.referralplug.co.uk/referral/category/car): Motorway
- [Car hire referral codes](https://www.referralplug.co.uk/referral/category/car-hire): THE OUT

## Blog
- [How much does THE OUT car hire cost? Every fee, sourced](https://www.referralplug.co.uk/blog/how-much-does-the-out-cost)
- [UK rewards card points value 2026: what a point is really worth](https://www.referralplug.co.uk/blog/uk-rewards-card-points-value)
- [InvestEngine cashback: £5 at TopCashback vs a £20–£200 bonus](https://www.referralplug.co.uk/blog/investengine-cashback-vs-referral-bonus)
- [Surfshark vs NordVPN: is the cheaper Nord-owned sibling worth it?](https://www.referralplug.co.uk/blog/surfshark-vs-nordvpn)
- [How to redeem Yonder points for the most value (2026)](https://www.referralplug.co.uk/blog/how-to-redeem-yonder-points)
- [Is Surfshark worth it? A 4-year verdict, and what I paid](https://www.referralplug.co.uk/blog/is-surfshark-worth-it)
- [Octopus Energy EV charger installation: cost, process and referral](https://www.referralplug.co.uk/blog/octopus-ev-charger-installation)
- [Yonder points value 2026: what are Yonder points really worth?](https://www.referralplug.co.uk/blog/what-are-yonder-points-worth)
- [How much does Surfshark cost in the UK, and how to get it cheapest](https://www.referralplug.co.uk/blog/how-much-does-surfshark-cost-in-the-uk)
- [UK energy refer-a-friend league table (2026): who actually pays what](https://www.referralplug.co.uk/blog/energy-refer-a-friend-league-table)
- [British Gas referral code 2026: how it works, and how it compares](https://www.referralplug.co.uk/blog/british-gas-referral-code)
- [ScottishPower referral code 2026: how it works, and how it compares](https://www.referralplug.co.uk/blog/scottishpower-referral-code)
- [Shell Energy referral code 2026: what happened, and what to do now](https://www.referralplug.co.uk/blog/shell-energy-referral-code)
- [Octopus heat pump & solar referral: get a £100 gift card each](https://www.referralplug.co.uk/blog/octopus-heat-pump-and-solar-referral)
- [Best UK bank referral bonuses in 2026: every scheme we've tested](https://www.referralplug.co.uk/blog/best-bank-referral-bonuses-uk)
- [UK voucher code sites compared: how often the codes actually work](https://www.referralplug.co.uk/blog/uk-voucher-code-sites-compared)
- [Where this guide disagrees with Which? on Octopus Energy](https://www.referralplug.co.uk/blog/where-this-guide-disagrees-with-which-on-octopus)
- [What do reviewers say about Surfshark?](https://www.referralplug.co.uk/blog/what-do-reviewers-say-about-surfshark)
- [What do reviewers say about Yonder? Every UK review compared (2026)](https://www.referralplug.co.uk/blog/what-do-reviewers-say-about-yonder)
- [What does MoneySavingExpert say about Monzo vs Chase?](https://www.referralplug.co.uk/blog/why-mse-recommends-chase-over-monzo-for-cashback)
- [What does Which? say about giffgaff?](https://www.referralplug.co.uk/blog/what-does-which-say-about-giffgaff)
- [Best second UK bank account to pair with Monzo (2026)](https://www.referralplug.co.uk/blog/best-second-bank-account-uk)
- [E.ON Next for EV owners: is Next Drive worth it?](https://www.referralplug.co.uk/blog/eon-next-for-ev-owners-is-next-drive-worth-it)
- [E.ON Next vs British Gas referral: which gives you more?](https://www.referralplug.co.uk/blog/eon-next-vs-british-gas-referral)
- [Is Monzo Max worth it? £17/month, Max vs Perks vs Extra (2026)](https://www.referralplug.co.uk/blog/monzo-extra-vs-perks-vs-max)
- [Monzo referral not working? How to fix it](https://www.referralplug.co.uk/blog/monzo-referral-not-working)
- [What does Martin Lewis say about Monzo?](https://www.referralplug.co.uk/blog/what-does-martin-lewis-say-about-monzo)
- [Monzo vs Starling Bank: which digital bank is better in 2026?](https://www.referralplug.co.uk/blog/monzo-vs-starling)
- [What does Martin Lewis say about Octopus Energy?](https://www.referralplug.co.uk/blog/what-does-martin-lewis-say-about-octopus-energy)
- [How to switch to Octopus Energy: a screen-by-screen guide (2026)](https://www.referralplug.co.uk/blog/how-to-switch-to-octopus-energy)
- [Can I switch energy supplier if I'm moving house? (2026 guide)](https://www.referralplug.co.uk/blog/can-i-switch-energy-supplier-if-im-moving-house)
- [Octopus Energy for landlords: how the referral works (2026 guide)](https://www.referralplug.co.uk/blog/octopus-energy-for-landlords)
- [Octopus Energy no standing charge: is it possible? (2026 guide)](https://www.referralplug.co.uk/blog/octopus-energy-no-standing-charge)
- [Who is cheaper than Octopus Energy? (2026)](https://www.referralplug.co.uk/blog/who-is-cheaper-than-octopus-energy)
- [Which Octopus Energy tariff is right for you? (2026 guide)](https://www.referralplug.co.uk/blog/which-octopus-tariff-is-right-for-you)
- [Is Tide worth it? A hands-on business account review](https://www.referralplug.co.uk/blog/is-tide-worth-it)
- [Is VOXI worth it? A hands-on mobile network review](https://www.referralplug.co.uk/blog/is-voxi-worth-it)
- [Is Motorway worth it? A review from someone who sold a car](https://www.referralplug.co.uk/blog/is-motorway-worth-it)
- [Is a Ledger wallet worth it? A review after 6 years](https://www.referralplug.co.uk/blog/is-ledger-worth-it)
- [Is giffgaff worth it? A review after 15 years](https://www.referralplug.co.uk/blog/is-giffgaff-worth-it)
- [Is Freetrade worth it? A hands-on investing app review](https://www.referralplug.co.uk/blog/is-freetrade-worth-it)
- [Is the BA Amex worth it? A credit card review](https://www.referralplug.co.uk/blog/is-amex-worth-it)
- [Is Bitrefill worth it? A review for spending crypto](https://www.referralplug.co.uk/blog/is-bitrefill-worth-it)
- [Is E.ON Next worth it? A review after 4 years](https://www.referralplug.co.uk/blog/is-eon-next-worth-it)
- [Is Monzo worth it? A review after 9 years as a customer](https://www.referralplug.co.uk/blog/is-monzo-worth-it)
- [Is Yonder worth it? My Yonder credit card review, 8 months in (2026)](https://www.referralplug.co.uk/blog/is-yonder-worth-it)
- [Affordable Mobiles review: is it legit and worth buying from?](https://www.referralplug.co.uk/blog/affordable-mobiles-review-is-it-legit)
- [How to spend Bitcoin in the UK: gift cards, top-ups and more](https://www.referralplug.co.uk/blog/how-to-spend-bitcoin-uk)
- [Best crypto hardware wallet: Ledger vs Trezor compared](https://www.referralplug.co.uk/blog/best-crypto-hardware-wallet-ledger-vs-trezor)
- [Zilch review: is 0% buy now pay later worth using?](https://www.referralplug.co.uk/blog/zilch-review-buy-now-pay-later)
- [Octopus Energy review: 6 years as a customer](https://www.referralplug.co.uk/blog/octopus-energy-review-is-it-right-for-you)
- [Monzo joint account review (2026): how it works after 4 years](https://www.referralplug.co.uk/blog/monzo-joint-account-review)
- [Best UK bank account for travelling abroad (2026)](https://www.referralplug.co.uk/blog/best-bank-for-travel-abroad-uk)
- [EV Charger Installation: Guide to Home EV Charging in the UK](https://www.referralplug.co.uk/blog/ev-chargers)
- [Octopus Energy for Business: what's included and the £75 referral](https://www.referralplug.co.uk/blog/why-switch-to-octopus-for-business)
- [Monzo Flex review: is the interest-free BNPL card worth it?](https://www.referralplug.co.uk/blog/monzo-flex-review)
- [Monzo vs Chase UK 2026: 2% cashback vs better budgeting](https://www.referralplug.co.uk/blog/monzo-vs-chase)
- [Monzo Business for freelancers: a review from a real sole trader](https://www.referralplug.co.uk/blog/monzo-business-for-freelancers)
- [Monzo mystery reward explained 2026: how to get £20, £50 or £100](https://www.referralplug.co.uk/blog/monzo-mystery-reward-explained)
- [Monzo vs Nationwide: which current account is actually better?](https://www.referralplug.co.uk/blog/monzo-vs-nationwide)
- [What is Monzo Billsback, and is it worth it? 2026 review](https://www.referralplug.co.uk/blog/monzo-billsback-review)
- [Octopus Energy vs E.ON Next: which is cheaper, and which pays more?](https://www.referralplug.co.uk/blog/octopus-energy-vs-eon-next-referral)
- [Yonder vs Amex Gold: Amex takes year one, Yonder wins the long run](https://www.referralplug.co.uk/blog/yonder-vs-amex-referral)
- [VOXI vs giffgaff 2026: is VOXI better than giffgaff?](https://www.referralplug.co.uk/blog/voxi-vs-giffgaff-referral)
- [How to claim the VOXI gift card, and what if it doesn’t arrive](https://www.referralplug.co.uk/blog/voxi-referral-code-gift-card)
- [How to claim the giffgaff credit, and what if it doesn’t appear](https://www.referralplug.co.uk/blog/giffgaff-referral-code-bonus)
- [Affordable Mobiles discount code, voucher & referral link](https://www.referralplug.co.uk/blog/affordable-mobiles-referrals)

## Optional
- [Expanded per-brand reference](https://www.referralplug.co.uk/llms-full.txt): entity claim, reward, link and FAQs for every brand