So very many opportunities to take advantage of this week in London! Summer's in full swing, and there are more outdoor festivals, gallery shows, lectures, film screenings, and general merriment than we know what to do with. Get started with this round-up for those light on the pocket jingle-jangle. Monday: Fancy yourself a BobCat? Heard all the rare B sides, own all the bootleg vinyls? Perfected your famed 3-pints deep gravelly-voiced rendering of 'Blowin'......