When flying in the UK, I have a simple rule:-
ALWAYS assume that it is carb icing weather!
Last summer it was proved to me, just how local carb icing conditions can be:-
Flying across the English Channel in almost CAVOK, when in mid channel, port engine showed definite signs of carb icing, that cleared with carb air to hot. Starboard engine showed no signs of carb icing whatsoever. This was in a type that is not very prone to carb icing.