[CAPTION]In an aerial view, the Tesla Headquarters is seen in Austin, Texas. Image: Brandon Bell / Getty Images North America / Getty Images via AFP [/CAPTION] Tesla's energy subsidiary has applied to become an electricity supplier in Britain, a first such move by tech billionaire Elon Musk's operations outside the United States. A notice on the UK energy regulator's website confirmed a weekend media report that Tesla Energy Ventures Limited had applied for a licence to supply electricity. Th...