According to a new study titled 'Migrant Voters in the 2015 Election' released here today, 6,15,000 Indian-origin voters are expected to vote in the May 7 election.
The figure is far ahead of the other migrant groups on the voter list - those from Pakistan at 4,31,000, the Irish Republic 2,97,000, Bangladesh 1,83,000 and Nigeria 1,82,000.
The figures compiled for the joint study conducted by Manchester University and Migrants' Rights Network are derived from the UK's Office for National Statistics analysis of 2001-2011 census data and include voters who are eligible to vote as Commonwealth citizens or have become British citizens after living in the UK for five or more years.
"[Anti-immigration party] UKIP have made all the running with the immigration debate in the past few years and we have seen all of the parties looking to offer a harder line on migrants.
More From This Section
"But there is another side to this debate - millions of hardworking British citizens who came to this country from abroad who find this kind of rhetoric profoundly alienating," said report co-author Robert Ford from Manchester University.
For the first time in this year's elections, it is predicted that more than 50 per cent of voters of the eligible electorate will have been born abroad in at least two seats in London - East Ham and Brent North - both with large Indian-origin populations.
"Migrant voters, just like anyone else, want to hear what the parties are saying on issues that are important to them. Too often, though, the message is that they are not welcome here. Instead, politicians should put forward a bold vision in which migrants are an equal and valued part of 21st-century Britain," said co-author Ruth Grove-White.
In this so-called "migrant power list" there are 12 Opposition Labour marginal seats, six ruling Conservative seats and two held by the Liberal Democrats.
"Politicians would be best served by seeking to reach out to this significant portion of the electorate ahead of May 2015 and to encourage their active political participation," the report concludes.