Thanks for your reply.
Just one more question.

for the UK per diem the factor will be 1.

For the income earled in LKR for the period I was in UK, can I just convert it to GBP and use uplife factor as 1 ?

Hi, Please can someone explain to me how my income will be calculated fir my Tier 1 (general) application to UK. I'm an employee of a Sri lankan Company and from 1/6/2009 to 31/5/2010 I earned a month salary of LKR 150000 per month for 12 months.(LKR 1800000). During the period 1/9/2009 - 28/2/2010 ...