A while back we managed to read the rings of some Greylags at Roath Park Lake.
We've recently found out that both Greylags were ringed across the border in Gwent at the Llanwern Steelworks (Newport), which hosts a breeding population of geese.
A Big Thanks to Richard Clarke of the Goldcliff Ringing Group and Kane Brides of WWT for the information:
Date ringed: 4th July 2006
Sightings: 6 December 2009 @ Llanwern steelworks
5231112 with White DARVIC on right; KK6 (in black)
Date ringed: 25 June 2007
Sighting: 24 May 2008 @ Llanwern steelworks
Retrap: 26 June 2008 @ Llanwern steelworks, when DARVIC ring was added
Sighting: 12 February 2011 @ Llanwern steelworks