Dunnock?

This is the best pic I have and unfortunately the bird has his head turned away slightly! Is it a dunnock? It certainly looks like one but I hesitate as there was a flock of them (this was the only one close enough for a picture) and I've always thought of these birds as staying only in pairs... Thanks! Taken yesterday in Shropshire.

 

 

"All weeds are flowers, once you get to know them" (Eeyore)

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