According to the British Election Survey (BES) released this week, 51.7 per cent of Indian-origin voters were against Brexit, compared to 27.74 per cent in favour of leaving the 28-member economic bloc.
However, there is a significant percentage (16.85 per cent) of those who "Don't Know", who are likely to hold the key in the referendum, described as a knife-edge vote so far.
BES surveyed a large sample of 22,000 voters, which found that 'Remain' has a narrow lead of 43 per cent as against 40.5 per cent in favour of 'Leave'.
The figures are similar across the board among South Asians, with Pakistani-origin voters backing remain 56 to 26 per cent and Bangladeshis 42 to 17.
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With just a month to go for the referendum, both Leave and Remain camps have been campaigning hard to win over the "Don't Knows".
However, this rhetoric has been countered by the remain camp which has stressed that Brexit would not provide any guarantees for a change in the dynamics of the UK's relationship outside the EU.
"Our membership of the EU does not prevent us from allowing people in from Commonwealth countries. It is not a binary decision, either EU or Commonwealth... If you fulfil the criteria, you can come here with a work visa," said UK Foreign Office minister in charge of India, Hugo Swire.