This 2012 video from Britain says about itself:
March is a great time to catch up with Gulls, as the birds that have been spending the winter months here begin to head back to their breeding areas. This winter saw a huge influx of Iceland and Glaucous Gulls into the UK. This video hope to help with the ID of these two often confused species.
I saw many glaucous gulls in Svalbard, where they nest.