Torque, not too sure where you get your facts from.
Bomber Command did drop leaflets / bomb Germany at night, with negligible results and losses. Losses did not become an issue until 1941 as the Kammhuber Line started to take its toll.
Seeing as the Mosquito didn't fly until November 1940 and wasn't available in decent quantities until 1943, its hard to see the role it could have played.
The Battle of the Atlantic was effectively over by the summer of 43 and the Battle of the Ruhr in Mar-Jul 43 was directed at German industry, a large part of which was supplying UBoat production. This battle alone took up 5% of Bomber Commands total sorties for WW2. Along with other raids that were specifically on yards and the devastating Operation Gomorrah in July 43, I would argue that in Bomber Commands early war, a substantial part of it was targeted at UBoat production.