The board, powered by 96 solar panels and five individual wind turbines, is the first of its kind in Europe, drawing on natural sources to illuminate when enough power is collected.

Phil Keoghan, chief executive of Ricoh UK, said: "We are focused on encouraging our supply chain to adopt sustainable business models that can help protect the environment whilst improving productivity and profits.

"The launch of the eco-board takes us one step further by reminding wider public audiences to act in a sustainable way and think beyond the obvious when it comes to protecting natural resources."

London's eco-board follows on from the solar-powered billboard Ricoh launched in Times Square, New York last year.