LOL! Major misconception about moving to Dubai - it's tax free and really cheap, you'll save loads of money!
Food and cars are cheaper but it stops there. Rent is HORRENDOUSLY expensive, utilities and services like broadband and cable TV are more expensive (than the UK). Alcohol is expensive. Dropping into the comfy expat lifestyle is expensive

I honestly don't think we'll save any money by living here, and in fact a lot of industries only offer you the same as what your take home was in the UK.
But on the flipside, Dubai is a wonderful place to live. I wouldn't swap it back for London anyday!