It is probably also worth mentioning that whilst in September 1939 Air Chief Marshall Sir Edgar Ludlow-Hewitt had 43 squadrons under his command,an oft quoted figure for RAF bomber strength. In fact only 23 of these were "operationally proficient". The rest were effectively restricted to a training role.
There was a wholescale reshuffle in April 1940 leading to the establishment of various OTUs from many of these squadrons.
Anyone imagining that a bomber offensive was not launched in May 1940 should take a look at the exploits of 2 Group and particularly 82 Squadron who flew on an almost daily basis against targets in Europe throughout the summer of 1940,suffering the most apalling casualties.
As an example,on 17th may a dozen Blenheims of 82 Squadron set off from Watton with orders to bomb enemy formations that had broken through near the Belgian town of Gembloux. Their escort never materialised. The formation was broken up by ground fire and pounced on by the Luftwaffe's Bf 109s. 11 of the 12 were shot down and one badly damaged survivor limped back to base. Within two hours of setting off the fate of 36 airmen was settled. 22 were dead,3 were PoWs,and the rest were either in allied hands or on the run,soon to be PoWs.
The Squadron would be rebuilt and on 13 August would raid Aalborg airfield in Denmark. This time one aircraft would return early with technical problems and the remaining eleven would all be shot down. 20 men died this time,the rest became PoWs.
That combined with the political and military reasons I already posted is why the sort of offensive originally envisioned did not take place,at least on the part of the RAF. Attempts were made,as above,to implement the "Air Plans" but with limited success and heavy casualties.
Luckily Falke Eins has explained the French situation about which I know little
.
As of the 9th May 1940,around the end of the phoney war,Bomber Command had already lost 619 airmen to all causes. This total does NOT include losses suffered by units serving with the AASF or ACBEF in France.By the end of 1940 it would be many more.
Cheers
Steve