Q-Bikes

Q-ships, also known as Q-boats, decoy vessels, special service ships, or mystery ships, were heavily armed merchant ships with concealed weaponry, designed to lure submarines into making surface attacks. This gave Q-ships the chance to open fire and sink them. The basic ethos of every Q-ship was to be a wolf in sheep's clothing.

That's what it says on Wikipedia any way, think about that when ya have a look at Martin's pre-waralike Trumpet.

There's a lot more to be said about this......................