Cheers all 🙂 Some helpful info.
Regarding the size – I’m happy to try 35s but do’t really want to go bigger.
Unfortunately some of the suggestions (like the bargain Contis) are a no go as I want to run tubeless. And I’m not listening to reason or very valid arguments about it 😀
I’ve tried the GP4000s on the towpath, and they a) puncture, b)were a bit scary, and c) felt pretty harsh. Hence upsizing a bit.
Gravelking (non SK) seem like a good compromise, plus skinwall (skinwall is a BIG preference) – as do the Ritchey’s that CFH suggested, but they don’t seem very available in the UK.
One thing I won’t be doing is Singletrack. I have zero desire for that. That’s what I have fun bikes for.
Looks like GKs may be most suitable then 🙂
FWIW I’m not a fast road rider, average speed is probably 15/16mph.