In the last few hours hundreds of flowers and tributes to the labour mp Jo Cox were left in Parliament Square, Central London. Pro EU parliamentary's death led to the suspension of the referendum campaign and the cancellation of the visit by Cameron to Gibraltar to defend the country in the EU. The British should vote the next day June 23 to decide whether to remain or not in the EU, the process is known as "Brexit". The murder shocked the British. Jo Cox, 41 years, was a lawyer was attacked when preparing to meet voters in Birstall near Leeds in Northern England. The press s aid that he had been shot and stabbed. Yorkshire Police arrested a 52-year-old armed man nearby.