

It's a maquette of the Royal Tank Regiment memorial in Whitehall Place, London, which was unveiled by the Queen in 2000:

There is a full size copy at the Tank Museum in Bovington:

The statue has an interesting history. The design was commissioned after the war for a memorial to RTR tank crews. It was to stand on Horse Guards but for various reasons the project was dropped, despite having been approved. The idea of an RTR memorial in London was resurrected in the 1990s and the site chosen was Whitehall Place, next to the Old War Office, appropriate as it is overlooked by the office in which Ernest Swinton conceived of the first tanks.
The statue represents a Comet crew and is full of accurate details including a representation of a BESA.
Regards
Stephen