In today's Metro I found not only useless news such as 'Celebrating 30 years of streaking' (as only the english can do) and news of the proposed referendum (the pictures of Gordon Brown and Michael Howard had the words 'Free' and 'Sin' respectively, made up of letters printed on a wall behind them, I wonder if it was intentional).

But on page 9, there is an advertisement for Canary Wharf and the tallest building in the UK. It reads as follows:

'Easily visible from the Thames, the 50-storey tower at 1 Canada Square in Canary Wharf is the UK's tallest building at 244 metres. Built in 1991, it houses 27 firms employing 7500 people.'

It then goes on to say:

'The aircraft warning light at the very top of the tower flashes 40 times a minute.'

The add is sponsored by British Airways and offers to see the tower and the Thames by flight. This is great advertising for mad people who'd fancy flying a plane into the building.