Smit, which in charge of salvaging Prestige before it sank, said the operation - to pump the oil back to the surface - would cost nearly 50m euros and take several months to complete.

BBC: French sub to try patching Prestige

This is an application, so most of what today's filing tells us is certainly not set in stone, but new ideas include a "kinetic energy gathering component" within the band -- like the trickle charge feature found on watches -- to pump energy back into the device.

ENGADGET

Back at the fuel pump, Mr Butler is setting off to Heathrow, powered by the left-overs from his own local fish and chip shop.

BBC: NEWS | UK | England | Devon | Dean ditches diesel for veg oil