TopCashback is my favourite cashback website. I use the website, app and/or browser plug-in. You can even get cash back for in-store purchases. If you’re going to spend money there’s often cashback to be had from many online websites so always check.
The cash back can take a little time to come through but it’s generally reliable IMHO. The cash back payout can be taken by bacs, PayPal or as a retail voucher with an added percentage. You can use this link to join https://www.topcashback.co.uk/ref/member271332245625. This link gives me the friend referral fee and you get £5 to help keep the wolf from the door.