LONDON - The British Government has presented a memorandum of understanding (MoU) to the Pakistani authorities under which the UK government will have the right to deport any Pakistani on the grounds that he or she has become a threat to national security without having to follow the due process, The Nation has learnt. The British Home Office still keen to insist deportation of 10 Pakistani students who were handed over to the UK immigration after no proofs found against them regarding the terrorist activities. After a cold blooded response by the British authorities, the lawyers of Pakistani students yesterday lodged an appeal in Special Immigration Appellate Commission (SIAC) to stop their deportation orders served by the Home Office. Deepening divisions between Pakistan and Britain were exposed today when President Asif Ali Zardari pulled out of a planned press conference with Gordon Brown. British Prime Minister's office at 10 Downing Street tried to play down reports that the President had cancelled the press conference at the last minute as a snub to Mr Brown. "It is entirely appropriate that he has a press conference with his counterpart," a 10 Downing spokesman said. However, on his last visit to Pakistan in December, Mr Brown and Mr Zardari did stage a joint appearance before the media. Zardari and Brown met for a private meeting after the press conference. But his absence from the press conference comes as the Pakistanis chide British officials for overly hasty conduct after the arrest of the Pakistani students a fortnight ago. The Home Office also refused sharing information about the arrests with Pakistan. At the press conference, Brown defended the arrests. "I think we have got to recognise that we have both got problems that are affecting both the security of our citizens and the sentiments in our country, with terrorist plots that have been planned and some people are trying to execute. We want to work together with Pakistan to deal with these issues and to tackle terrorism at its roots". Brown flew into Islamabad after a whistle-stop visit to Kabul and Helmand province in Afghanistan. The Pakistani press had predicted that the prime minister would receive short shrift from Pakistani officials after his condemnation of Pakistani nationals who were arrested on terror charges in the UK. At after the arrests, Brown had said UK intelligence services had foiled a "very big plot" before all were released without charge. Senior Pakistani defence officials have said the British authorities failed to consult them adequately, and greater cooperation would have avoided "embarrassing mistakes" for the British government.