SALZBURG - Prime Minister Theresa May was set to appeal directly to fellow European leaders at a summit on Wednesday to drop 'unacceptable' Brexit demands that she said could rip Britain apart, and to urge the bloc to respond in kind to her plan, according to a senior British government source. 'I believe that I have put forward serious and workable proposals. We will of course not agree on every detail, but I hope that you will respond in kind,' she was set to tell the other European Union leaders over dinner at the Felsenreitschule theater in Salzburg.