Just thought of this in the morning, having seen a documentary recently. So, both sides are quite dependable on their convoys, with both sides suffering hit-and-run attacks by both smaller and larger vessels. Yet, neither side has utilized Q-ships, how come? Wouldn't it be a huge tactical advantage to have a seemingly innocent looking train of 5 freighters, of which 2 are refitted with concealed weaponry to give the attacker a nasty surprise? Even if only to force the enemy to commit more of their ships to the attack, in case Q-ships are part of a convoy, reducing their ability to utilize these attacking ships elsewhere. That way you either attack enemy convoys less frequently, or you take a gambit that you cannot respond to a counter-attack because your reserve ships are now needed to strike a convoy, to cut your losses to a minimum if a Q-ship is present. Besides, imagine the horror when one of those cargo modules on an enemy freighter is actually a concealed torpedo release chamber, throwing two dozen torpedoes at your frigate or corvette from a mere 1500 metres.