London Eye architect Marks Barfield has revealed designs for Villa Hush-Hush.

It has received planning permission … but don’t ask us any more than that. The home, which can disappear into the ground and rise up to two storeys (40m) thanks to a system designed by engineer Atelier One, will be built in a top secret location. Do you know where?

Answers on a postcard (or email building@ubm.com)