Looks as if the Nimrod R1 and MR2 varients days may well be numbered.
The MR4A is still not due into service until 2012 at the earliest.
Both types are rumoured to be retired early despite extensive upgrades-it now looks almost certain that the UK will buy the US Boeing RC-135 Rivet Joint.
The Nimrod retirement looked increasingly likely following the damning reports and outcry after the loss of XV230 and it`s 14 crew.
Personally I`m not sure buying the RC-135 is a good idea;it could become a very expensive quick fix.