I say it so many times because I cannot really believe some of your assertions! A bit like the
in your last one. Really? And you would know this exactly how PN? I'm not going to comment any further except to say you may wish to believe this, but your wish is wishful thinking.
As to
The Sentinel took 5 years from first flight of the production aircraft to first operational flight.
We are of course comparing apples with orang-utans. There are only 2 realistic options available to the UK: P8A and CASA 295. Both are proven, available and one benefits from having UK OCU trained and OEU personnel embedded within another nation's military (sadly also the most expensive option). They are both vastly different from the development process of a bespoke single type fleet as manifested by the Sentinel.