Your Ladyfriend will have to apply Steve and will need to demonstrate to the Embassy that it is a legitimate visit and that on the balance of probability that she will return to the Phils or at least leave the UK
You can support her application by offering accomadation and if needed support itsa bit of a lottery but a well prepared application will be better than a poor one.
Although it is possible to spend up to six months on a visitors visa that would be exceptional ,you say its for a holiday so give the time period some thought and any evidence such as family/propety/employment that ties her to the Phils will help as well as if possible evidence of sufficient funds in her bank there.A statement that travel insurance will be taken out for medical emergancies would also be useful
