India, Sept. 21 -- A merican reality TV star Kim Kardashian and her boyfriend, British racing driver Lewis Hamilton, traded their luxury cars for bicycles during their London getaway on Saturday. The couple were spotted cycling around the city and stopping for afternoon tea along the way. They were accompanied by a security guard, who cycled a short distance behind them. Before London, the couple had been holidaying across Europe, with stops in Paris and Italy. Kim, 45, and Lewis, 41, first sparked dating rumours in February this year after being spotted together in Paris and attending the Super Bowl. Kim made their relationship Instagram official in June, sharing a carousel of photos and videos that included a selfie of the pair riding bicycles together in New York City. htc...