So mudguards fitted. I think they look good. Was easy enough and managed to do it without removing wheels. However a couple of points to note.
1: when fitting the front guards, you first have to “pop” a couple of rivets on each side (keep the top rivet in situ). This is done by pushing the centre of the rivet through with a very small screwdriver. Thanks to @Das for his help on this. However the holes left behind in the bodywork were actually too big for the screws supplied with my mudguards. Luckily I had a (very) old pack of U Clips from Halfords in my toolbox and was able to use these to make the holes more useable and the mudguards very secure. Had to drill a small hole to secure the bottom of the mudguard (small enough so the supplied screws would fit) but did this once I had fitted and secured the guards using the two screws and U Clips to the side. Turning front wheel full lock will allow enough space, at least it did with my 20inch alloys. I’m sure 21’s will also be fine.
2: Rears, whilst being able to utilise the torx screws already in place, had a lot less room to work with. I ended up using an adjustable wrench and the correct torx bit. Was a bit fiddly, but got the job done. Anyway I’m very happy with the results. May not be for everyone, but I’m happy with the less shouty “dad wagon” vibe that I’m trying achieve and the mudguards add to that I think.