The Conservative Party has accused the government of rigging new legislation to allow pro-euro parties more money for referendum advertising than those opposed to the single currency.
Under the Political Parties, Elections and Referendums Act, passed last week, parties will be allowed to spend from pounds 500,000 to pounds 5m on referendum campaigns, according to their share of the vote at the most recent general election.
Conservatives are angry that the Bill was guillotined during its final stage in the House of Commons, leaving no time to debate the provisions for referendum advertising and campaign spend.
Tory constitutional affairs spokesman Dominic Grieve MP said the Act would allow Labour and the Liberal Democrats to pool their share of the election vote and spend up to pounds 4m more on referendum advertising than the Tories.
He also attacked the Act's provision for separate government spending on 'information campaigns' until 28 days before a referendum.