Black ring with white two alpha code separated by a white line (on one leg) and metal ring (on the other leg).
note 1 : birds were ringed in the UK since 2016.
note 2 : the two letters of the code are separated by a white line (e.g. A|A).
Used letters are : A, C, F, H, J, K, L, N, O, P, S, T, U, V, X, Y, Z.
note 3 : c-ring on left leg means birds ringed in East Anglia while c-ring on right leg means birds ringed in SW England.
note 4 :