Without explaining the law and how the whole thing work, I will give you the short and precise answer.

Just travel using your filipino passport as would have in past.

regards

Hello,hoping you can help me to answer my question.just a follow up question from my previous one.if i had my oath taking ceremony and did not apply yet for british passport,can i still travel using my indefinite leave to remain in my old passport.or if u automatically had the british citizensip is the home office totally cancelled your indefinite leave to remain in the uk.thanks.