Launched at the Guildhall on Tuesday was the world's first "zero-emission" 7.5 tonner to go into service. Two of the electrically-powered trucks are being used in London for six months, one by TNT Express and one by TNT Logistics on its Starbucks contract. They will take 400 over the next two years if the test vehicles perform as promised. The purchase price "is twice that of a conventional diesel". Supplier Smith Electric Vehicles converts chassis cabs from Avia of Prague.