<sod >'Refusing to join me in Cambridge tonight would be another sign of Theresa May's weakness, not strength.'  The Prime Minister refused to take part in head-to-head debates with any other party leaders during the campaign for the June 8 election.< eod>< sod > 'Refusing to join me in Cambridge tonight would be another sign of Theresa May's weakness, not strength.'  TWITTER MOCKS THE PM FOR NOT SHOWING UP Theresa May was mocked by the other party leaders tonight for her failure to attend the BBC debate.< eod>