West London Birding regularly helps with the gull catches and ringing on and near the Thames estuary.
Further details about this project are available at www.ntgg.org.uk
We have also started colour ringing Black-headed Gulls in the Central London Royal Parks. Our rings are orange with a four alphanumeric code starting with 2V or 2X. Please report any colour-ringed gulls you see to us via our Contact form on this website, e-mail or through the BTO Report a ringed bird link