Hiya,
Many thanks for the replies! You've confirmed my thoughts. I think it would be better to have a week, maybe a little less being at home with my mahal supporting her getting used to living in the UK.
I put myself in her shoes. If I had not been to the Phils before and after a day or so after arriving, I was just left alone in an empty house I'd feel lonely.
I mentioned this to her at the weekend (via YM) and she said that she'd be OK, she'd spend the time cleaning the house and cooking food. Personally, I don't think it would be quite as easy as that for her.