Bomber Command sent more than six hundred sorties on operations across much of north-west Europe tonight. Mosquitos attacked Châteaudun, Ludwigshafen and enemy airfields. More carried out radio counter-measure or intruder patrols. 26 Whitleys and Wellingtons scattered leaflets over enemy territory. 26 Lancasters, Stirlings and Halifaxes laid mines at ten locations off the French coast and in the Heligoland Bight. But by far the largest proportion of the aircraft flying operationally on this night were detailed to attack four marshalling yards and one coastal gun battery, all in Belgium or northern France. Bomber Command, on 10 May 1944, was firmly engaged in invasion preparation.
The coastal battery was at Dieppe, hit by concentrated bombing from 60 Lancasters and eight Mosquitos around “well-laid” markers. Transportation Plan targets included marshalling yards at Lens, Ghent, and Courtrai, all attacked by forces of between 90 and 130 bombers. Ghent was bombed accurately and the raids on Lens and Courtrai were concentrated but centred somewhat outside the target areas. But for this story we have a special interest in the final marshalling yard on tonight’s target list: Lille.
It was to be a short flight and I thought it would be simple but I could not have been more wrong.
-Wing Commander Rollo Kingsford-Smith, 463 Squadron
There would be 85 heavy bombers, all of 5 Group, making the hop across the Channel to Lille. They were supported by four Mosquitos of 627 Squadron, 5 Group’s own target-marking unit. Tactics were broadly similar to those used elsewhere on Transportation Plan raids: by the light of flares dropped by Lancasters from 97 Squadron, the target would be marked with red spot fires by the Mosquitos. Lawrence writes that this would be the second time that the newly-developed ‘offset marking’ technique would be used. The spot fires were intended to be deliberately dropped a short distance away from the aiming point and a ‘false bombing wind’ calculated and transmitted to the main force to use when aiming their bombs so that they dropped onto the actual aiming point and clear of the markers themselves. As for the Sable-sur-Sarthe raid of four nights ago, the role of Controller for this raid was taken by Squadron Leader Harry Locke, a former 467 Squadron Flight Commander, who was now with 97 Squadron. His Deputy Controller was a New Zealander from the same squadron, Flight Lieutenant John Smith. There is evidence that suggests that Squadron Leader Phil Smith also had a Deputy Controller role to play in this raid. Meanwhile the man in charge of the target-marking Mosquitos of 627 Squadron, was Squadron Leader Norman MacKenzie.
LM475 B for Baker was one of seventeen aircraft from 467 Squadron and fourteen from 463 Squadron to depart Waddington for this operation. The first bomber to take off, B for Baker left the runway at 21:57. EE143 was one of the following aircraft, departing eleven minutes later. Evidently cleared of its inability to fly straight, it was being flown by Pilot Officer Doug Hislop.
There were two early returns. A 9 Squadron Lancaster suffered an engine failure and turned around not long after taking off from Bardney, and a 50 Squadron aircraft jettisoned its bombs off the Norfolk coast before returning to Skellingthorpe after the rear turret failed. But the rest of the force carried on, crossing the Channel from Clacton in Essex to a point between Dunkirk and Ostende. From there they turned south-east to the Belgian border near Courtrai. Then, in clear air but with some haze visible lower down, they headed south-west towards the target.
The illuminating flares were dropped on time over Lille by Lancasters of 97 Squadron, most of which had identified the target by H2S. Harry Locke thought the initial flares were somewhat scattered, but Mosquito DZ468 dropped a red spot fire about 150 yards south of the marking point four minutes before H-Hour. The bombing wind was calculated and broadcast to the Main Force “in good time” and the first recorded aircraft to drop bombs was DZ418, a Mosquito, at 23:34. Over the next eleven minutes some 28 aircraft would drop their loads of high explosives. While some crews thought the bombing was not as concentrated as usual, many others considered the attack highly successful, with bombs exploding in close proximity to the marker. But they were too close:
As bombs were about to be released the red spot fire was hit by another bomb and practically extinguished.
-Pilot Officer H Forrest, 9 Squadron
This, of course, was precisely what offset marking was supposed to counter. The smoke was rising almost to the height from which the bombers were attacking and it was being blown by the wind back along their bombing runs. This was enough for Wing Commander Anthony Heward, the man in charge of the Main Force, to fire two red Verey cartridges at about 23:40 and call a halt to the bombing via W/T.
Next post: The target is re-marked and the bombing begins again
This post is part of a series called 467 Postblog, posted in real time to mark the 70th anniversary of the crew of B for Baker while they were on operational service with 467 Squadron at RAF Waddington, Lincolnshire. See this link for an in-depth explanation of the series, and this one for full citations of sources used throughout it. © 2014 Adam Purcell
 Sortie statistics and targets from Night Raid Report No. 602
 Kingsford-Smith, Rollo 1999
 Night Raid Report No. 602
 Lawrence, WJ 1951, p.184
 Bending, K, 2005. p.121
 Smith, Phil, Recollections of 1939-1945 War, p.24
 9 Squadron Operational Record Book
 50 Squadron Operational Record Book
 Night Raid Report No. 602
 Pilot Officer Ed Dearnaley in the 467 Squadron Operational Record Book
 Harry Locke in 97 Squadron Operational Record Book