I phoned these people up, about a year ago. Had a long chat with them. After discussion they basically seemed to be saying that we would need to provide them with proof from my wifes university that she had done what the degree certificate had suggested she had done (some sort of verified transcript). Before going any further. After further discussion and prompting it became obvious that my wife's degree wasn't recognised as a degree level certificate. I asked them to look it up on a list of recognised degree courses in their system.
We also noticed a charge for their services. Not cheap.
My impression is that if one went to De La Salle or University of Philippines Dilman, for example then the degree would be recognised.
My wife went to the University of Perpetual Help in Cavite, but they didn't seem to recognise that university.
Further inference from UK NARIC was that my wife's degree was more akin to a vocational certificate that wasn't of degree standard in the UK.
From the point of view of her visa, application, we decided that the quickest, simplest and best course of action was for her to do her English Language Test instead. Now that she is here, she hasn't been able to obtain work anyway because of the strict Isle of Man regulations on work permits. And now she is a mother. Hopefully we might get in touch with UK NARIC again when the baby is older but I am not holding out much hope for their approval on her degree certification as a meaningful equivalent of a UK degree course.