From ULTRA (TNA HW 5/2):
17 June 1940
CX/JQ/57
T20 4. It was reported on 17/6 that various NCO’s and men from fighter units of Luftflotte 2 were to undergo courses of instruction in the Messerschmitt factories at Augsburg and Rechlin. Courses would be from 20/6 to 26/6. Object of course is to instruct personnel in the new employment of Me 109 and Me 110 with bombing equipment. Units from which personnel are to be drawn are ZG 76, ZG 26, I./ZG 1. (A)
T9 6. It appears to be the intention of the Germans to use Me 109 and Me 110 aircraft for bombing purposes. Some at any rate, have been fitted with bomb-carrying apparatus. (B)
NOTE: T20 and T9 are the numbers of the teleprints in which this info was issued by Bletchley Park. 4 and 6 are the paragraph numbers within CX/JQ 57. (A) and (B) are categories of reliability of the interpretation with (A) being definite.