Thanks for this thread and the people who shared their successful experiences of getting their British passports without changing their non-British passports. I managed to appeal to HMPO and received my renewed British passport without changing my name on my non-British passport.
I have dual citizenship and renew my British passport few months ago. My name on my non-British passport is [First birth name X] + [Middle birth name Y] + [Maiden surname Z]. My name on my British passport is [First name A] + [Married surname B]. I didn't have problem to apply my first British passport but until renewal because of the one name policy!
When I received the letter and my non-British passport from HMPO, their letter didn't say Exceptions but said "you must follow" if going to the country to change name is the way to do so. Thanks to this thread and I learned exceptions from paragraph 6.6 in Annex A : use of names in passports (
https://www.gov.uk/government/publicati ... e-guidance).
I applied by using point iii of paragraph 6.6 in Annex A: use of names in passports. This is "where there is a requirement for the person to travel to their country of origin in order to change their name, and due to exceptional circumstances in their country of origin, they would be placed at a high level of risk.".
The risks I said are : The place of my non-British passport has political unsafety which cause me fear of travelling to there. Also the place is in severe Covid situation that requires compulsory of isolation of 3 weeks but I haven't accrued enough holiday to do so as I started a new job (I provided a copy of my new employment contract as evidence) so I would be at risk of losing my job. The final risk is worry of leaving my husband for a minimum of 3 weeks due to his illness.
Besides applying the exceptions, I also use paragraph 4.1 from Annex A: use of names in passports (
https://assets.publishing.service.gov.u ... t_2016.pdf) to prove I have been using the name on my British passport since I emigrated to UK. I provided various evidences to cover different period of time throughout my life in UK. The supporting documents are in colour photo copy and they have P60, certificate of naturalisation, driving licence, bank statement, marriage certificate, etc.
I requested HMPO to renew my British passport based on all the reasons and evidences I provided. I asked to apply observation code OBTO from this link
https://www.gov.uk/government/publicati ... -passports
After 3 days of sending the appeal letter and all evidences, I received an approval email from HMPO for my British passport!
I now have received my British passport with an observation of the details of my non-British passport.