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I'm Chris Bulby and this is Analysis.

The general election is looming but an even more important

votes on Europe could follow and plans are already being made. So here's referendum

conundrums.

A few months until the election, you might assume that's all the political schemers can think about, but come with me into the thick undergrowth of campaigning

offices and think tanks that cluster around here near Westminster, and let's eavesdrop on a very

different but urgent conversation underway, mainly behind closed doors.

This is not about the election, but about another hugely significant battle that may

engulf Britain's politics in the next few years, a vote on whether we remain in the European Union.

It's still an argument we need to put with passion, and my argument is we should start making it now there's no point

waiting until whenever this referendum is held maybe in three or four years time and this

is not just Westminster chatter adding to the urgency of referendum planning is what happened last year in Scotland.

People are starting to think about how the campaigns could be won,

and also people are reflecting particularly on the Scottish referendum and trying to learn

...