15% off bikes from Halfords
There also seems to be the same offer through Quidco using code BIKE15, I guess you get the 3% cashback too that way though can’t say for sure as it’s not explicit. Looks like this one expires “in one day”. I realised too late and didn’t want to risk messing up my order to try and get the extra cashback as mine was the last one in stock and apparently cancelling the order is not instant.
Some people on the forum claim some branches will also give you 10% British Cycling discount on top of this if you collect in store. I’m not a member so couldn’t try and live chat told me it was not possible to do so, but worth a try if you are a member!