Warbler?

Warbler?

Observation - Warbler? - UK and Ireland. Description: This little chap (?) was skulking in a tangle of branches in a marshy area. Mostly grey / brown but just a touch of yellow on the back and tail.

This little chap (?) was skulking in a tangle of branches in a marshy area. Mostly grey / brown but just a touch of yellow on the back and tail.