they are not that great in muddy conditions as they just clog
Riding in the wrong sort of mud...
Thetford is mostly sand, so no chance of anything clogging there. I guess it depends on if you want tyres specific to a race, or just a decent, fast all-rounder.
I need them for a single race so I guess as specific to Thetford race circuit as possible. I won't be doing any training for this so there's no point going for something general.
They said:
"Despite what they look like, they are not that great in muddy conditions as they just clog"