In 1942 the Baedeker Raids were in operation against British cities in retaliation for RAF Bomber Commands attacks on Germany. The "Luftwaffe" was stepping up its campaign although it was fully engaged on the Eastern Front. On 18 April Do 217s raided Portsmouth in retaliation for an attack on Lübeck on 28/29 March. An attack on Rostock resulted in retaliation with raids on Bath, Exeter, Canterbury, Norwich and York. On the night of 26–27 April 1942 the "Luftwaffe" attacked Bath. MacLachlan took off in the evening of the 26 April and headed for airfields around Evreux and Dreux. He claimed a I./Kampfgeschwader 2 (KG 2—Bomber Wing 2) Dornier Do 217 destroyed which came down near Evreux severely damaged. A second was damaged but his port cannon jammed preventing its destruction. Air Vice Marshal Trafford Leigh-Mallory sent his congratulations and his exploits were printed in "The Times" newspaper. On 30 April MacLachlan and Kuttelwascher set out again with a 25-minute interval between both. Kuttelwascher claimed a Do 217 and He 111, but MacLachlan settled for the destruction of two locomotives between Le Havre and Rouen. He also damaged a tug boat on the Seine and destroyed another locomotive near Yvetot. These successes were achieved in two missions on the same night.