not sure how long they were in service for exactly ... from shortly after the 2nd ww,(1948 I think) designed by the then senior designer (who also designed the lanc) at A.V. Roe . I worked on them when I was at raf st mawgan (cornwall) from my arrival there in 1967 until they went out of service (at st mawgan ) in 1972 . I think it was still flying from lossimouth .... most of the remaining airwothy 'shacks' went to the SAAF (south African airforce) where they flew well into the 1990's I believe. I moved on to the Nimrod from 1969 until I left the service in 1975.aparently there is an MR2 shack at Coventry airport, under the care of the shackleton preservation trust, currently taxiing, and hopefully flying sometime in the future