If the MOD kept their 8 Flights and bought new aircraft through the procurement process we would not see new aircraft until 2015 - 2020
If rumours that SAR-H delivery is slipping right are anything to go by then we probably wont see new aircraft at the mil flights til 2015 anyway as I believe they will be transferring the interim contract flts first.
Having said that unless the mil procurement process has improved I dont imagine they could meet your timeframe either!!
And with a defence spending review planned for early next year who knows what will be left of any plans for mil procurement anyhow
