Marsh /willow tit?

Not the best of shots but this guy was down at the loch today flying around with some long tailed tits (who were far too fast for me to catch!)
I'm thinking he's either a marsh or a willow.....

Freezing out there today! I didn't have my cosy boots on and my feet are little ice blocks! (actually big ice blocks!)
As for my fingers..... The less said the better!! Brrrrrrr! :-\