But BBC News Online science editor David Whitehouse says that if contact with Mir is lost for an extended period, it will start to spin, and it would become impossible for a rescue team to dock.
Former Downing Street spin doctor Lance Price, who published his diaries of the period between 1997 and 2001 earlier this year, told the committee he had waited five years before publication and - unlike many anonymous Whitehall sources - his name was "on the dust jacket".