I cannot tell what this bird is

Hello,

this is my first post.

I have a small (great tit size) bird, predominantly white and grey with a black head and a white strip on the head, that is larger than a coal tits and this bird has a really predominant white V on its back when wings are closed. Its not like a coal tit that has a broken V is way way more predominant than that.

 Could it be still a larger coal tit or something else?

I do not have a camera to do it justice.

Any help would be appreciated 

Dan