Unknown garden bird (photo)

Location: Rural garden in Leicestershire 
Hello, I was watching my feeder (the usual goldfinches) and I kept hearing a distinct loud cheeping from a bird in my neighbours tree. I couldn’t recognise it by both visual and sound but it sat in the tree for approx 5 mins cheeping away. Definitely not a goldfinch, as the call wasn’t as twittery but more of a strong loud, cheep. It was lightish brown, had a white cheek, was pretty small. Any  ideas? Thanks, Ellis [BIRD IS IN UPPER CENTRE OF THE PHOTO]