Nigel,
Many thanks for the sighting and photo.
It is difficult to make out the final digit of the colour ring.
Based on the age of the bird at ringing it could be 71,72 or 79.
What I can say is that it’s a bird which was colour-ringed ringed at Harewood Whin landfill site, to the west of York, (53.960 -1.177). The bird was caught using a Cannon Net and is one of around 2500 Gulls which have been caught and colour ringed to date.
Harewood Whin is one of the decreasing number of Landfill sites in the UK where it is possible to operate for the catching and ringing of gulls. Whilst with us the gulls feed on the Landfill site during the day and roost on the floods in Lower Derwent Valley National Nature Reserve or on the Humber Estuary.
The bird was rung on 30th June 2017.
I hope you find this of interest and many thanks for taking the time to report your sighting.
Best Regards
Mike Jackson
PS from NK: The Green ringed BHG seen on the same date appears to be a Norwegian bird.
