In the early days of 360 we argued for a war role, but never had a formal one when I left I 69. According to the RAF Historical Society record on their seminar on the Canberra in RAF Service, it never did get one.
Wanderoo, I think the RAFHS are in error on this point. At the disbandment Photocall one sunny but chiily November day, I asked one of the aircrew officers present if they had had a war role: "Comms Jamming" was the reply.