Prepare to meet your friendly neighbourhood guerrilla knitters, whose prime objective is to enliven the dull city streets with a riot of colour ? one stitch at a time. These creative knitting ninjas transformed a ballerina outside the Royal Opera House with their woolly works of art and installed a 13-ft spider's web, replete with trapped insects and fairies, in a tunnel beneath Waterloo station. These photographs of their exquisite feats will ensure you never see knitting ? or London ? the same way again. Deadly Knitshade is the founding member of London's Knit the City graffiti knitting group. Colour photographs