Those who doubt that DARA can do this need only look at the differences in cost and timescale between the Jaguar upgrade and the BAE Tornado GR4 upgrade.
Interesting point Jacko. Perhaps DARA could make a bid to upgrade the Sea Harrier for less than BAE Systems did. If the sums were smaller, it would be easier for the MOD to think again.
Additional Comment: The MOD was recently criticised by the National Audit Office for writing off the several hundred million pounds that were spent upgrading the Sea Harrier to FA2 standard. If DARA could deliver a cheaper upgrade now, then the Admirals might have an easier time trying to save the Sea Jet.