If you're thinking of using Topcashback, please consider using my referral code. https://www.topcashback.co.uk/ref/sleepyfergus
I started using TCB just over a year ago, and have managed to get £120 back (I've an additional £30+ pending from Christmas pending).
I'll be honest, its not a quick process as it can take weeks before companies pay out (and sometimes it is piddly amounts), but I just let it sit and gather away and will withdraw £20 or £30 here and there.
Thanks