Maunsell Sea Forts
Any idea what this is? An exclusive still from an upcoming Doctor Who episode perhaps?

No - this is actually a close-up view of one of the Shivering Sands towers, part of one of a series of forts placed off the Kent coast to provide protection for the Thames Estuary against enemy aircraft activity during the Second World War.
I recently went as part of a group of 11 people to tour three of these forts onboard a RIB - quite an experience in itself, especially crossing the wakes of some of the huge container ships!
It was also the first outing for my new camera and I’m very pleased with the results - the photos are now online as is a video of the trip.
Hywel, who deserves a lot of credit for organising the trip, has also got some great photos.