Double taxation

I am working in UK for Indian MNC. I am here on work permit and not paid Indian salary duing my stay. I came to UK in January'12 and planning to go back to India in July'12. Since I am covering two financial years, I want to know my tax liablity in India for income earned in UK for each financial year. As per my offer letter, I am paid on nett model and any tax liablity  in UK is taken care by my employer which means I am paid fix amount every month.  In month of  May I received p60 certificate from employer where in I can see my Income and tax details as on 5th April'12 but the tax paid seems to me very less as this is just 2% of income given in p60. 

I want to know if this is ok to pay 2% tax in UK and do I need to pay any tax in India while filing ITR for 2012-13. If I have to pay tax in India then how much and how will this be calculated. If not would I need to disclose this UK income while filing ITR.

Thanks