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British Prime Minister David Cameron (L) listens as he meets with former British Royal Marine Commando and-D Day veteran Patrick Churchill, at the Millets Farm Centre Cafe in Abingdon, near Oxford, west of London, on June 22, 2016, as the prime minister continues to campaign to avoid a Brexit ahead of the June 23 EU referendum.
Wednesday is the last day of campaigning for Britain's referendum on whether or not to stay in the EU, a momentous decision with far-reaching implications for Britain and Europe.
/ AFP / POOL AND AFP / Geoff CADDICK (Photo credit should read GEOFF CADDICK/AFP/Getty Images)