Police are dousing pub and club lavatories with an anti-drugs spray that causes cocaine to stick to surfaces and adds a foul taste. Durham is believed to be the first force in England to trial the spray to deter drug-taking in public, with the Essex, Merseyside and City of London forces considering following suit. The clear substance is sprayed on surfaces that could be used by customers to cut and take drugs such as cocaine.... The spray contains a powerful bittering agent which leaves a bad t