Question about helping my friend get a tourist visa to the UK from Thailand....... She has a good job in government, finances her daughter at university and has a property so would obviously be looking to return too her home in Thailand. UK immigration is tough, and as I would look after her in the UK, has anyone experience of exactly what documents one needs to support the 2 week visa?

I read I would need to write an invitation, maybe demonstrate (how?) I have enough money to support her living with me, but how much, and does the UK immigration need other proof, besides her return flight?

This would not be until next summer, but I would like to do my research now.