By Guy Taylor Rapidly expanding Chinese automaker BYD is close to a deal that would see it supply all-electric double decker buses in London. Transport giant Go-Ahead Group is set to award the Shenzhen-based firm a contract to build more than 100 of the vehicles at around £400,000 each and £100,000 cheaper than its UK competitors, sources told the Sunday Times. The decision has been given the green light by Transport for London (TfL), which is chaired by Mayor Sadiq Khan. BYD previously partnered with competitor Alexander Dennis and has produced hundreds of electric double decker buses for Go-…