Details from Paul Roper, North Thames Gull Group, show 2B31 has been here since at least 20th December and was also here November-December 2019, which was first sighting after being ringed as a nestling in June 2018 at Fishers Green in the Lee Valley near Waltham Abbey. A quick look at their records shows many Black-headed gulls hatched there head west for the winter, ranging from Galloway to Portugal.
