This winter has seen several records of over-wintering Lesser Whitethroats in Britain. Several have been spotted feeding in gardens on suet feeders, and at least two have been caught, ringed and their DNA has been analysed by scientist in Aberdeen.
The upshot of all this clever science is that the birds seen in Sheffield and Tynemouth; Northumberland, have been identified as "Siberian Lesser Whitethroats", most likely from Kazakhstan!
There is an article on the Sorby Breck Ringing Group website with a picture of the Sheffield bird here .
Information about the Tynemouth bird and pictures of another bird seen in a Derby garden can be found on the Birdguides website here.