Hi! Sorry I can't private message at this stage. Not sure if I need to post more?!
I'm in Perth, so a few hours behind you
I have been researching my husband's father's situation. It's a little different to your husband's but I'm wondering whether the same things may apply. I'll write out the key points and what I think is correct:
1. He was born in 1947 in Singapore - his paternal grandfather was born in England.
2. In 1948, he became a Citizen by birth - because the 1948 act was retrospective for British subjects.
3. In the 1950s he moved to Australia and in 1967 he was given a CUKC passport.
4. When the 1971 immigration act came into effect, he had right of abode due to Section 2(1)(b)(ii).
5. The 1981 act revised the 1971 act and he now has right of abode due to 2(1)(a) based on that table you mentioned -
https://www.gov.uk/government/publicati ... -abode-roa
6. Therefore, he is a BC other than by descent (based on Section 14).
I'm struggling to get my head around point 5.
I know your husband's parents were born in the UK, but it seems that s.2(1)(b)(i) [parent] and s.2(1)(b)(ii) [grandparent] were both turned into S.2(1)(a).
Is this the same reasoning you applied?
Thanks so much!
