As I said in a previous post. If the policy to send mk3 across to the RN goes ahead(and I think it will), it will not meet the timescale of those who are making it. Why? To make something happen it must be resourced properly, ie aircraft, instructors, accommodation and a realistic timescale. It must also not in any way compromise current operations...
As for mk4, still haven't seen any £s on the table??