This summer's mustn't forget accessory may come in handy again this weekend. These photos were all taken in the last month.
Many thanks to David Henderson, Mark Massey, Darren Lehane, David Telford, Laurabot_ once and twice and thrice, la Bragarde, Chris McCrossen and Linda "Noirchick" Wisdom for sharing their photos in the Londonist Flickrpool.