+1 for britool I got the spanner set and 1/2 drive socket set both imperial and metric. I’ve got no problems with halfords pro as I had those spanners when I first started buying tools at the age of 16 as I was a hgv mechanic. But I found the spanners a little thin and dig into your hands after undoing a stubborn rusty nut/bolt. The halfords pro 3/8 drive socket set however is a nice bit of quality kit and served me well and I still use it now for tinkering with the car and bikes.
So for spanners britool for me every time. Sockets either, not much difference in quality really, just the price.
Edit: 3/8 drive is plenty big enough for bike maintenance.