Don't worry, I don't mean to come across like I think that it's foregone conclusion, but a few days ago I thought it looked unlikely that I could make it work at all and was really down about the whole thing, now it seems like I have at least a chance.
I'll be on the same daily rate as I get in the UK, so I'll definitely be above P1 level, so I am glad that may well help my case.
I now need to find out more from the company that I do work for to see the timescales of exactly when they want me in Singapore so I can properly start to plan accordingly.
Thanks again for the advice that you've provided, it's most useful.