Excerpt from wikipedia:
(more at this link)
http://en.wikipedia.org/wiki/De_Havilland_Mosquito#Survivors
"When the Mosquito began production in 1941, it was one of the fastest operational aircraft in the world.[6] Entering widespread service in 1942, the Mosquito was a high-speed, high-altitude photo-reconnaissance aircraft, continuing in this role throughout the war. From mid-1942 to mid-1943 Mosquito bombers flew high-speed, medium or low-altitude missions against factories, railways and other pinpoint targets in Germany and German-occupied Europe. From late 1943, Mosquito bombers were formed into the Light Night Strike Force and used as pathfinders for RAF Bomber Command's heavy-bomber raids. They were also used as "nuisance" bombers, often dropping Blockbuster bombs - 4,000 lb (1,812 kg) "cookies" - in
high-altitude, high-speed raids that German night fighters were almost powerless to intercept.
As a night fighter, from mid-1942, the Mosquito intercepted Luftwaffe raids on the United Kingdom, notably defeating Operation Steinbock in 1944. Starting in July 1942, Mosquito night-fighter units raided Luftwaffe airfields.[emphasis mine]"
Another article shows Mosquitos operating with virtual impunity against German airfields during '42 and '43.
Exerpt from wikipedia:
More at the link:
http://en.wikipedia.org/wiki/Bombing_of_Cologne_in_World_War_II
"30/31 May 1942 RAF 868 aircraft bombed Cologne during the first 1000 bomber raid (1,047 aircraft),[10] laden with over 3 million kg of ordnance.
31 May 1942 RAF Photo reconnaissance by 5 de Havilland Mosquitoes of No. 105 Squadron RAF.[10]
31 May/1 June 1942 RAF Two aircraft. Conditions were cloudy over Cologne so no bombing was undertaken. Both aircraft returned to base.[10]
1 June 1942 RAF 2 Mosquitoes in a nuisance[nb 1] and diversionary raid.[10][nb 2]
26 July 1942 RAF 3 Mosquitoes in a nuisance raid.[10]
10 August 1942 RAF Single Mosquito on a nuisance raid, bombs and returns to base.[10]
25 August 1942 RAF 4 Mosquitoes to Germany on nuisance raids, one of them to Cologne, three complete their mission and bomb. One lost.[10]
2 September 1942 RAF 1 Mosquito on a nuisance raid, bombs and returns to base.[10]
2 September 1942 RAF 2 Mosquitoes on a nuisance raid, bomb through cloud and return to base.[10]
7 September 1942 RAF 1 Mosquito on a nuisance raid, bomb through cloud and return to base, no record of the bombing on the ground.[10]
15/16 October 1942 RAF 289 aircraft.[10]
22/23 January 1943 RAF This was the first raid on Cologne using "Oboe" navigation, two Mosquitoes damaged 55 houses, killing 5 people and 22 injured. This showed that using electronic aids a few bombers were able to inflict as much damage as 100-bomber raids in poor weather in the previous years.[10]
2/3 February 1943 RAF 161 aircraft.[10]
14/15 February 1943 RAF 243 aircraft.[10]
25/26 February 1943 RAF 6 Mosquitoes to the Ruhr in a diversionary raid (the main attack was against Nuremberg), 13 people were killed in Cologne[10]
26/27 February 1943 RAF 427 aircraft.[10]
May 1943 RAF [10]
11/12 June 1943 RAF 1 Mosquito as part of a diversionary raid (the main attack was against Düsseldorf)[10]
13/14 June 1943 RAF 2 Mosquitoes bombed Cologne one of several nuisance raid.[10]
16/17 June 1943 RAF 212 aircraft.[10]
17/18 June 1943 RAF 2 Mosquitoes bombed Cologne, one of several nuisance raids.[10]
19/20 June 1943 RAF 6 Mosquitoes to Cologne, Duisburg and Düsseldorf (the main attack was against Le Creusot).[10]
22/23 June 1943 RAF 4 Mosquitoes as a diversionary raid, (the main attack was against Mülheim).[10]
23/24 June 1943 RAF 3 Mosquitoes on a nuisance raid.[10]
28/29 June 1943 RAF 608 aircraft.[10]
2/3 July 1943 RAF 3 Mosquitoes on a nuisance raid.[13]"
Of course, there's no way they would want to focus on wiping out the Luftwaffe and all its airfields, equipment and installations, not to mention the loss of pilots that would be inflicted by focusing completely on the Luftwaffe first and foremost.
So the Mosquito was mostly reduced to the role of "nuisance raider", photo recon, etc.