The last weekend of summer in London is marked by the Bank Holiday weekend. When Notting Hill Carnival is over and the big clean-up in RBKC is over, it's time to look forward to the new school year. This in turn predicates the return to serious business in The City of London, as the traders and the bankers return from their summer retreats and holidays. The machine that is London, starts to grind its gears back into action. Cab drivers also set themselves up for a busy return