She needs to fill up the forms and pay the application fee online (using a Visa/Mastercard credit/debit card). Then she needs to make an appointment at VFS (I believe it's also done online now, you better check it on their website http://www.vfsglobal.co.uk/philippines/) for an appointment to submit all the documents (the printed filled up application form including the Appendix 2 form, all the supporting documents like bank statements, proof of relationship, photos, etc.). There will be no interview when she submits the application form and documents at VFS. They will just get it all from her and she will be required to do biometrics right there (fingerprints, signature and photo taken).