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By Cassandra Vinograd

The battle for Britain's future played out Wednesday on London's River Thames.

The country's looming June 23 vote on whether to leave the European Union — dubbed a "Brexit" — has seen both sides of the debate ramp up their rhetoric and campaigning.

On Wednesday, both those backing a Brexit and those pushing for the status quo took to the famed Thames.

A flotilla of fishing boats backing a Brexit sailed under London's Tower Bridge. A counter-demonstration — with the help of singer and activist Bob Geldof — used dinghies and banners to spread the "In" message.

Musician and campaigner Bob Geldof joined a counter-demonstration as a flotilla of fishing vessels campaigning to leave the European Union sailed up the River Thames in London on Wednesday.STEFAN WERMUTH / Reuters
A boat from the "Fishing for Leave" campaign group and smaller boats from the "In" campaign join a flotilla along the River Thames on Wednesday.) / Getty Images
Part of the flotilla campaigning to leave the European Union sails past Parliament on Wednesday.STEFAN WERMUTH / Reuters
Supporters of the EU Remain camp attach banners to Tower Bridge on Wednesday as they await the flotilla backing a Brexit.BEN STANSALL / AFP - Getty Images