Rowlands Pharmacy have been sponsoring a meal replacement programme called 'Celebrity Slim'. It seems to be the kind of thing where you lose weight by abandoning regular meals in favour of sachets.
On the tube, they advertise the success of the product by telling us the total collective weight loss of all the participants. Eight tons to date. That's a lot of weight evaporating in one go.
It got me thinking that if enough people joined the programme, maybe we could counter global warming by raising the UK another couple of inches above sea level.