A World War Two wreck in the Thames Estuary could explode at any second and prompt a “tsunami risk”, experts fear. The SS Richard Montgomery sank in the Thames Estuary in August 1944 with 1,400 tonnes of explosives still inside. The three masts that can be seen above the water’s surface are going to be removed, however, experts say that this is not enough. A new survey has revealed that the body of the ship is also collapsing, so the explosives need to be removed as soon as possible. Professor David Alexander of University College London said that the vessel remains a “serious threat” and that…