The rise of social media means there are now even more ways for people to send in the same thing. Like this video, which has been tweeted, poked, and emailed to us, and someone even wound down their car window and suggested we do something on it.

Tomorrow the letters will start arriving. So here it is.

Thanks to everyone. We nearly gave up just then. These people seem to be on the case when it comes to working out who actually made it and why and how.