Video footage reveals evidence of Gwent colour ringed Med Gull

I've been using the video facility on my Panasonic Lumix of late with interesting results. This still taken from a short video of two Mediterranean Gull at Tredegar House Lake back in October clearly shows a white colour ring on one of the birds. It was a brief glimpse revealed only by going through the footage frame by frame. It seems this is the first documented record of a colour ringed Med Gull but unfortunately the clarity of the still is not of a quality that allows the number to be read.