Motor Torpedo Boat (MTB) was the name given to fast torpedo boats by the Royal Navy and the Royal Canadian Navy. The 'motor' in the formal designation, referring to the use of petrol engines, was to distinguish them from the majority of other naval craft that used steam turbines or reciprocating steam engines.The capitalised term is generally used for the Royal Navy (RN) boats and abbreviated to "MTB".

During the Second World War, the US Navy boats were usually called by their hull classification symbol of "PT" (Patrol, Torpedo), and are covered under PT boat although the class type were still "motor torpedo boats".

After the end of the War in 1945, a number of the Royal Navy's MTBs were stripped and the empty hulls sold for use as houseboats.

Mined and sunk off the River Schelde on 29 December 1944.

1 Died of wounds, 3 Men missing since.