Dutch Black-headed Gull.

I managed to read the colour ring on a first winter Black-headed Gull at Thornton reservoir. The colour ring is white with a black code, EH9E. Having gone on to the European colour ringing site I was able to find the ringer responsible for this project. I emailed him and he quickly sent me the details on this bird.
The gull was rung as a nestling as part of the Griend project at the Wadden Sea in the Netherlands. Date Lutterop is the ringer and he was able to tell me that this gull had been rung on 30/06/2016. It has travelled 444km to spend the winter at Thornton. Date informed me that they ring hundreds of Black-headed Gulls and many of them winter in England.