Transport for London has unveiled the world’s first fully electric double-decker bus, just a month before it is due to hit the capital’s roads. The new bus, which was built by Chinese manufacturers BYD and comes with a £350,000 price tag, was debuted this week by Matthew Pencharz, deputy mayor for the environment and energy, at an event next to City Hall. “We think this is the first fully electric double decker bus in the…