Families have been told to close their windows and doors as some 100 firefighters tackle a huge blaze in a London suburb. Crews dashed to reports of a fire affecting a range of railway arches and businesses, including vehicle workshops, situated within the arches near Roxeth Green Avenue in South Harrow, northwest London at around 1.30am. They remain at the scene, and have advised residents to keep windows and doors shut due to the smoke. Piccadilly Line services on the London Underground are