The Astutes really are the aces in the UK's conventional pack IMHO and ideally we'd certainly have more. But with the 7th having been in doubt at times this is still good news. Although as people have said we could really do with 10 or 12, and could certainly use an eighth, if realistically that's unattainable in the current funding climate (or even any new funding climate after the current review) the key thing is first must be to invest fully in the 7 we will have, including addressing manpower issues, so that we can use them to their full potential and maximise availability. The fact that they should never need refuelling should also help with that.