On 25 May, Johnson experienced an unusual mission. His section engaged a Dornier Do 217 carrying British markings, four miles west of his base. Johnson allowed the three inexperienced pilots to attack it, but they only managed to damage the bomber. Days later, on 26 June 1942, Johnson was awarded the Bar to his DFC. More welcome news was received late in the month as the first Spitfire Mk. IXs began reaching RAF units. On 10 July 1942, Johnson was promoted to the rank of squadron leader, effective as of the 13 July, and given command of 610 Squadron.