British expats in Europe are reportedly concerned about the repercussions of Britain leaving the EU, with experts predicting an exodus from the continent if voters opt to leave the bloc.

Access to healthcare, the value of pensions and the right to study overseas are among the fears British citizens abroad harbour, The Times reported.

Already 100 British residents of Spain leave the country every day amid fears over the region's economic woes, it said.

France has warned that if Britain opted to leave the EU in the June 23 referendum, Britons would no longer be able to access public healthcare.

“The issue is sowing panic among Britons who have taken early retirement to France,” Christopher Chantrey, chairman of the British Community Committee of France, told the newspaper.