Birdwatchers at a reservoir have said it was “extraordinary” to see a rare gull in Britain for the first time.

The kelp gull was identified at Grafham Water near Huntingdon, Cambridgeshire, on Sunday.

The seabird is usually found throughout the southern hemisphere, but not this far into the northern hemisphere.

Gary Allport from Birdlife International said it was “amazing” to see the gull, which is normally a “coastal species”.

“You do get them inland in certain places but usually only when they’re breeding,” he said.