Wrong, Ken...
1312 Flt moved from RAF Stanley and operated the C130K until 1996. The MPA tanker type which then replaced the C130 tanker was the VC10K and the flight then operated one VC10K and one non-tanker C130 for 17 years from 1996 until the VC10K4 was retired from service in 2013. The task was then inherited by the TriStar for about a year before a Voyager was deployed as the new MPA tanker to support the Typhoons based there.
Currently 1312 Flt operates one Voyager and one C130J. As the RAF's A400M does not have an AAR role, due in main to the AirTanker contract, although it would be perfectly capable of meeting all MPA-based tasks, the A400M is not likely to be deployed until the C130J is retired from service - if the commitment is still required, of course...