After more than four decades of (mostly) happy marriage, the U.K. is approaching an in-out vote on its membership of the 28-country European Union.

Read here: 'What's the UK's beef with Brussels?'

Peter Wilding, director of British Influence, says pro-EU campaign must focus on hope rather than fear in runup to UK referendum on membership.

Read here: 'Pro-Europe lobby must not rely on economic argument, says campaigner'

BNE Campaign Director Lucy Thomas debates with Brian Monteith, Campaigns Director of Global Britain, about the timing of the EU referendum.

Read here: 'Could an early EU referendum scupper the UK's chances of a successful renegotiation?'

The battle groups to stop ‘Brexit’ are forming. Can they win?

Read here: 'The "Ins" and "Outs" of Britain's referendum'

The Independent editorial says that pro-European groups, such as Business for New Europe, need to make the positive case for Britain's continued EU membership.

Read here: 'All aboard: Now that Labour has decided to support a referendum on Europe, the 'pro' camp needs to get its act together'

Lucy Thomas, Campaign Director of Business for New Europe discusses Britain's EU referendum on BBC News.

The 'Wizard of Oz' helped to mastermind David Cameron's election success.

Read here: 'EU referendum: Lynton Crosby is Tory Eurosceptics' choice to secure British exit'

Lucy Thomas, Campaign Director of Business for New Europe, appeared on BBC World News to debate the economic consequences of leaving the EU with Robert Oulds of the Bruges Group.

The UK is set to have a referendum by the end of 2017 on whether or not to remain a member of the European Union.

Read here: 'EU referendum: Facts on the UK's planned in-out vote'