Once upon a time all was delightfully clear: there were definitives and there were stamps that were not definitives. Christmas stamps were sort of definitives but, being produced in the commemorative style of the day, one could safely leave them to the general collection or ignore them if that wasn't your bag. Now I'm beginning to have doubts. These may pass but this year's 4 small size stamps I mentioned previously have a sort of Smilers feel to them and I've convinced my self of their merit in my definitive collection so I guess I'll have to add the Christmas ones too. That view is confirmed as I see that there will also be two 'Large' additions, being the small size reproduced on a Horizontal PiP size stamp and lots of white space.
What worries me is what I do if more 'special' stamps come out in these formats and I shall have to get them too + all the variations. Maybe I should have stuck to machins after all!