Quote Originally Posted by darren-b View Post
If you don't renew your citizenship you could still carry on using your Philippines passport even though it will be invalid but I don't think anyone will actually know. Not sure though what would happen if Philippines immigration spotted you had a British passport and was still using your Philippines passport even though you hadn't applied for dual citizenship.
Thanks Darren onced again. I was really confused so I sent email to Philippine Embassy in London.
I am glad to share with you and to other members.
Here's their reply:

Yes, your Philippine passport becomes invalid when you obtain UK citizenship.
However you can then apply for Dual Citizenship (form downloadable from Embassy website) and at the same time apply for a new Philippine passport.
Please note that you have to go to the Philippine Embassy in London to swear your Oath of Allegiance before being granted Dual Citizenship because you lose your Philippine status when ever you get UK passport.
Please look at the section on Dual Citizenship on the Embassy website for more information of the requirements.
Regards

Thank you very much.