American warship sank in 1944 with approximately 1,400 tonnes of munitions onboard

A sunken US wartime ship in the Thames estuary holding enough unexploded bombs to devastate a Kent coastal town and send a tidal wave through London has been made slightly safer, ministers have announced.

Engineers have removed the masts of the SS Richard Montgomery – a second world war cargo ship that sank in 1944 with approximately 1,400 tonnes of munitions onboard – without triggering the kind of feared explosion that has kept the wreck under constant guard for decades.