Herring Gulls -- recoveries

Herring Gull -- Blue 469;-
This was seen on the Nevern 11/09/08 by Paul G.

Herring Gull -- Blue BAE;-
This was seen on the Teifi 17/07/07.

Herring Gull -- Blue BCE;-
This was seen on the Nevern 24/05/08.

These were all ringed at the Gloucester Landfill Site on The Severn estuary in Oct/Dec 2006.
Are these from the Pembs. population wintering in The Severn area? or...?
All aged as near adult /adult.