Yes you have to apply to Philippine Embassy in person at London, my wife renewed hers 6 weeks ago.
You can call the Embassy to make an appointment or I also think you can do it online, you must take with you her current passport, a completed application form,(printed from their website)and if she is using her married name, the official marriage certificate.
Please note the Embassy does not accept debit/credit card payments or cheques - only cash or postal orders - and the fee is £43.
Please check the details with the Embassy online and any queries just give them a call...![]()