Marsh or Willow Tit

Question

Hello, initially thought this was a willow tit but now I'm not so sure. Unfortunately every picture has a grub in it so can't see if there is a spot on the beak.

TeeJay · Accepted Answer

I can empathise with your dilemma, Nick, I struggle with these. 
For what it's worth I would go for a Marsh Tit. I would have expected to see more silvery wing panels on a Willow and more of a bull-neck. I think Marsh has a wider black nape than a Willow which this one seems to have. 
Best wait for more informed opinions. I know Alan sees Willows on a regular basis so he may be able to give a better ID than me.