Thanks for your question.
What type of passport was it? Was it a traditional UK passport or was it a British Overseas Citizen's passport?
Sorry for the delay.
A traditional UK passport valid for 6 months.
The purpose was that the Army Air Corps unit I was with was moving from Tripoli, Libya to Nairobi, Kenya and we were to travel by air over the Sudan. It was only valid for 6 months so had to be renewed to allow me to travel by air back to the UK at the end of my 3 year term of overseas service.
I've just got to go in to a meeting. I will respond in an hour or so if that's okay.
Sorry for the delay.
You cannot obtain a UK passport (as opposed to a UK Overseas Citizen passport) without being a UK citizen. You do not lose citizenship by expiry of time so you will still be a British Citizen now.
If you have taken on another nationality since 1966 then you may have by implication renounced you UK citizenship, but this would depend on the laws of the country whose nationality you have taken on. Some allow dual nationality (the UK does for example) but others do not.
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