I'd be very surprised if she needed to travel to Manila to do this.
Don't listen to anything the CAB have to say. They rarely take any care and attention over their advice (in my experience at least), and generally its easier to find out for yourself.
Check out (or point them to) - http://www.ukba.homeoffice.gov.uk/pa...temp-resident/

She may also want to look at - http://www.ukba.homeoffice.gov.uk/pa...anentresident/ as I'm not sure which advice would apply given the parents different immigration status.