It seems that the BBC are making use of Flickr in support of their How We Built Britain series. They've recently created a group that you can submit photographs to that feed their Britain in Pictures project.
Thinking that it looked like a fun thing, and thinking that they were using a sensible license policy for the submitted photographs, I've decided to take part.
So far I've added five photographs to the queue and they've all made it onto the BBC site:
Click on images for larger versions