"British Airways is committed to improving its environmental performance, and reducing the adverse impacts of its activities on the global and local environment." So says their website, which lauds the company's environmental record in "improving fuel efficiency and developing engagement with customers".
Pity that no one told their transatlantic division; it seems they've been caught flying empty planes between North America and the UK, in order to keep their landing slots at Heathrow open. Neither is it the first time this has happened - back in March British Mediteranean Airways (a franchise of BA) was sending jets between Heathrow and Cardiff to keep slots open.
Frankly, it's no wonder that this sort of madness occurs, when fuel is untaxed and planes so cheap to run. It just goes to show that for the aviation industry, when it comes to choosing between the environment and profit margins, those pound signs are always going to come out on top.