article_snippet: Mandelson feared Mandelson would have to break in to 10 Downing Street after civil servants told Mandelson it would be inappropriate for Mandelson to be seen entering the front door after the last Election.
article_snippet: Gus O'Donnell, the then Cabinet Secretary, told Labour peer it would be wrong for senior Labour aides to been seen entering No10 while talks were still ongoing about which political party would form the next Government.
article_snippet: In one scene Gordon Brown, who is still Britain's Prime Minister even though Britain's Prime Minister does not have an overall majority, heads off to No10, joking: 'Before they lock us out.'
article_snippet: But a furious Gus O'Donnell tries to divert the PM's entourage of cars when a furious O'Donnell receives a call telling a furious O'Donnell
article_snippet: they are almost at the gates.a furious O'Donnell
article_snippet: You can't use Downing Street for party political purposes.'
article_snippet: We are going to have to break in.'
article_snippet: Gus O'Donnell is forced, however, to allow the PM through the gates when Mandelson reminds Gus O'Donnell that Brown is 'actually and not just technically' Britain's Prime Minister.
article_snippet: But the peer and other senior party aides were forced to enter No10 through the back door of the Cabinet Office – and then found that all the peer and other senior party aides computer passwords had been changed.
highlights_snippet: Cabinet Secretary told Labour peer could not enter  with coalition talks on .
  