Bomber Commands early loses were against German naval ships, bombing of the German mainland was forbidden.
Indeed - if bombing German ships proved so costly, bombing Germany itself would probably have been at least as costly if not worse.
Not sure what you are referring to re Spitfire and Mosquito.
The whole premise of this thread is "Would the RAF have been better off fighting WWII with only these two types instead of the plethora of types which were actually employed?". My point is that neither of these types was remotely suitable for clsing the Atlantic Gap therefore the answer has to be no.
If you read my last post I state Yards,not pens. As Wensleydale mentions the Augsburg raid, a substantial part of Bomber Commands war was directed at the industries associated with Uboat production and the prevention of their construction.
My mistake - but I can't agree with 'substantial' as an accurate description of less than 5% of Bomber Command's effort.