Dear Sir , First step will be to determine the residential status of you in the FY 2015-2016 . This can be determine with the actual no of stay in india and your earlier year stay in India .
Once you are resident in India , your global income will be taxable in India . Thus you have to pay the tax on your all salary income whether earned in India or out of India .
However , the salary is charged to tax on the basis of actual stay in that country and in this case it may happen that you have paid the taxes in US or UK too through the TDS .
If you have paid the taxes in that country , you can claim the Foreign Tax credit as per India USA DTAA and India UK DTAA.
Hence in view of the above , there are possibilities of the refund . However this is a fact specific issue and all the above issue should be checked before any conclusion.