Finally got the mudguards on! Only three trips out to the shops for more fixing hardware. Should have planned ahead a little better, but I didn't really know what was going to be required til I took a proper stab.
Rear could be tucked a little better, and actually it is now, because first day out witg them some attention-lite dope rolled in to the back of me, bending a stay and meaning everything had to be re-adjusted! All good again now.
I was really surprised how easily they gobbled up the available clearance. I got 40mm guards hoping to go back to 30 or 32c tyres, but there's absolutely no way. I had to bend the guard closed to go between the chainstay (could cut it off, but want the protection) and the nut under the fork crown is only a hair's breadth away from the tyre at 25c.
Really pleased with how they look!