On: UK unveils new Tempest fighter jet

[twic]

There's a white paper sort of thing from the Ministry of Defence that goes into the rationale, more than it goes into any technical details:

https://www.gov.uk/government/publications/combat-air-strate...

A large part of it is about supporting the high-tech manufacturing industry in the UK, so it creates good jobs, attracts investment, can compete for exports, etc.