I would say, prune bush roses and HTs and floribundas etc in Feb.
Prune climbers about now - late Oct, Nov, Dec, but preferably before the strong gales start whipping the long new growth around and damaging it and possibly damaging passers by.
Prune (tidy up) ramblers after flowering but do structural/renovation type pruning in the winter).
Pruning roses at the wrong time of year won't kill them, but it may reduce the amount of flowers you get the following season.