well, so in uk u get 14.4 k before tax, how much is tax?, assum 30%, sorry i have no clue about uk tax levels u make around 10 K QAR, here it is 12 K... 20% increase.. not a huge but than 10 K rent per month, will it be paid u by cash or will they directly pay to landloard,

reason coz, if they pay u direct. u can get 1 bed room for say 6 K and get additonal 4 K to ur  bottom line...  this make it around 60% increase..... can be worth it... but ensure they give u medical, transport, etc as well.

any other allowances?? try to negoiate around 20% more to u r basic salary... best of luck and message me if u need any more info.. regards