© licensed to London News Pictures. LONDON, UK.  02/06/11. Boris Johnson is shown the manufacturing process at Brompton Bicycles in West London. The Mayor of London Boris Johnson visits two major manufacturing firms today, 02 June 2011, to see the role they play in supporting London's economy and why the UK's capital city  is so critical to their continued success. He called in to Fuller's in Chiswick, London's only traditional family brewery, to see their new multi-million pound brewing facility. He went on to visit Brompton bike factory. Where he met Brompton inventor Andrew Ritchie, who still owns the famous company and remains its Technical Director.  Photo credit should read Stephen Simpson/LNP