Mixed winter flocks

Is a good mix of species in our winter flocks, here in Pembrokeshire, becoming a rarity?

This AM, close to Narberth Town Centre, we encountered a flock comprising:- 2 Treecreepers, 2 Nuthatches, c5 Coal Tits, a good span of Long-tailed Tits, several Great Tits, single Goldcrest and Chaffinch. And of course, the dominant Blue Tit.