TOURIST VISA APPLICATION FOR FILIPINO COMING TO UK

Hello, I am Steve from the UK and I am looking to bring a friend of mine over from Phils to here, using a tourist visa. I have been up and down the internet trying to figure out how to go about it, who to contact (here in the UK or Phils), and what to supply as documentation. Leizel (on the Phils side) has already handed in my invitation letter to the relevant department in Manila and has an appointment in a month's time.

I have quite a few questions, is this a site to help me? I confess I haven't looked through the site so any pointers would be appreciated. I am single here, have my own flat and my family is close by. Leizel has a child who will be looked after while she is here. What evidence should I supply and what should she supply?

She works in a restaurant, doesn't have a bank account and has very little to her name. I will fund her trip and give accommodation. I understand she has to take documentation supplied by me in to her appointment?

Is it a fairly successful procedure most of the time? Is this the correct site to ask for advice?

I really appreciate any answers that can be given here.

Many many thanks