The words that are heard are often less interesting than the words we are not meant to hear.
Gordon Brown's famous gaffe over the Labour supporter who he called a bigot when he thought there was only his aide who could hear him, has been followed by David Milliband asking Harriet Harman why she was clapping when his brother Ed declared that the Iraq invasion was wrong.
We can now reveal other unheard conversations. After Ed Milliband met the famous 'bigot' woman at the Labour Conference words were heard escaping his lips: 'That's the crone who lost us the election!'
Likewise Union leaders hearing Ed critise strikes were heard by an astute ear not only saying rubbish but 'why on earth did we support this scumbag?'
David Cameron who is known to favour Ed Milliband over his brother David, exclaimed for a hidden microphone 'I think I may have got it wrong. David's asides in the Brown mould might have been more useful.'
Warning notices have gone out to all prominent M.P.'s that they should keep their thoughts to themselves. An edict announced: 'The last thing we need is for the general public to think we a load of bitter, twisted creeps.' As luck would have it this secret advice was leaked to your avid reporter.