Britain’s exit from the European Union (EU) will have a negative impact on the $108-billion Indian IT sector in the short term, industry body Nasscom said on Monday. However, Nasscom said the exact nature and extent of the impact - if ‘Brexit’ happens - will emerge over a longer period of two years or more. Brexit refers to the possibility that Britain will withdraw from the EU with the in-out referendum on its EU membership to be held on June 23.