As well as a RAF bomber, large numbers of Canberras were ordered for photo reconnaissance duties culminating in the P.R-9. This was unarmed, carried seven cameras under the fuselage, with an increased wing area, plus more powerful Avons, which gave it a much greater operational ceiling. To ease production, the P.R.9 was built by Short Bros at Belfast, entering service in January 1960, and it still remained in RAF service at the start of the 21st Century
