Each September, London becomes a working showcase for the industry we're part of. LDF26 runs from 12-20 September, its 24th edition, and once again the city's showrooms, design studios and streets turn over to new launches, live installations and open doors. We've picked out the highlights from across this year’s lineup - from Knightsbridge to Shoreditch, King's Cross to Clerkenwell - that are worth building into your route this year.