Anglesey Circuit? Would need the start line not next to the pits.
Pembrey and Kirkistown have access issues to the paddock (well no access during races unless temporary bridge added).
Mallory Park, just no
Continental Europe?
Zandvoort, Zolder, Assen, Le Mans, Nurburgring, Spa, Val de Vienne, Mettet, Magny-Cours. Probably too costly, Knockhill is bad enough for some teams.