Perhaps it is just as likely, and logical, that the RN will go for the P-8.
If you accept that the likelihood is zero! It's never going to happen!
Every day that passes without Armageddon is further reassurance to the Government that we can cope fine without an MPA. And if it all goes Pete Tong, we can simply add Russia/China/whoever to our Overseas Development recipients and pay them not to float around in British waters...