Marc Jacobs is probably the world’s most commercially successful designer. He’s also one of the busiest. Although he now has control at Louis Vuitton and a host of eponymous diffusion labels, this was his first creative venture – and is probably closest to his heart. Launched in 1986, the Marc Jacobs mainline is characterised by shows jostling with celebrity, ironic ad campaigns featuring the likes of Victoria Beckham, much-copied handbags named after models - and brilliant, desirable, but always offbeat clothes.