Sorry to keep pushing, but I'm getting conflicting answers online regarding my original question.
To clarify, I'm not seeking British citizenship - my Irish citizenship confers on me much the same freedom of movement and work in and around Europe, and the UK.
But as I'm sure you're aware, the UK issues many different types of passports to citizens/subjects of former colonies,
Ireland included - without conferring any particular right of abode, or citizenship - by the granting of such passports.
That being said, having a British Subject passport in Asia, even one without a UK right of abode, is a lot more beneficial than one from most other EU states - particularly Ireland, in terms of visa requirements.
So, ipso facto, my father being a British Subject in 1978, 'otherwise than by descent', at the time of my birth - does that status not transfer directly unto me, as his direct descendent born prior to the 1981 Act, thus, making me eligible for a British Subject passport?
Thanks for your patience!