All alone

This clematis, Ville de Lyon, is holding on despite quite a few heavy frosts. Can't quite remember when it started flowering but it's early days (only second year) and I didn't prune it last year. Have just read it's in pruning group three so I need to hard-prune it in late winter (mid-Feb) by cutting all stems back to 25cm above ground level. Each pruned stem needs at least one good pair of buds on it. So hopefully I'll now remember to do this (will write on the calendar).