Marsh or Willow?

 

Hi guys, I was trying to take some photos at a local Heronry but light and grey sky never worked right so I sort of saved it for another day. But on the way back to the car found this pole that had been primed for birds and patience got some nice shots of both Nut hatch and this Tit. Each time I look at it I change my mind so anybody like to add their 'pennyworth' to end my confusion?

Thanks, David