Bird seen today and recently on rose bush

Bird seen today and recently on rose bush

Observation - Bird seen today and recently on rose bush - Global. Description: Spotted this bird recently in our garden. Picture shows it on rose bush looking as if it was picking up small bugs. Not seen it before, though we get a wide variety of birds. Smaller that a sparrow. Garden in very rural area of Lincolnshire in the wolds.

Spotted this bird recently in our garden. Picture shows it on rose bush looking as if it was picking up small bugs. Not seen it before, though we get a wide variety of birds.
Smaller that a sparrow. Garden in very rural area of Lincolnshire in the wolds. Think it may be a willow warbler but not sure.