As I am a complete mechanical numpty, what are the easiest road mudguards to fit??

Ta!

Are there many choices?

SKS are the best chromoplastics are tujour. However, set aside an hour (two if it’s your first time) and allow a generous handfull of patience. It’s satisfying at the end.

SKS are great, but Merak’s right with the fitting time, once you’ve done it once, it’s easy.

I’d also agree with SKS and they are initially a PITA to fit. But once you have done taking them on and off becomes a 10 minute job.