I think you're right,Richard,not the first time and it's probably got it off to a fine art-he deserves the piece for flying skill and ingenuity.We have a problem in the city with these gulls,The Local Authority smear oil on the eggs ti stop them hatching but the problem is the open municipal garbage tip a mile from the city,there's hundreds there and they plague the city centre-we're two miles from the city centre.
http://www.thisisgloucestershire.co.uk/news/Seagulls-attacked-Gloucester-man/article-2447418-detail/article.htmlHeres the landfill
http://news.bbc.co.uk/1/hi/england/gloucestershire/4698749.stm