Video: David Cameron accuses MP of taking 'mind altering substances' The Prime Minister accused the Labour MP of having been on a "night out on the town with Reverend Flowers" after the Mr Meacher questioned why the UK was lagging behind Mali and Guatemala in terms of business investment. "I can only conclude that the Right Honourable gentleman has been on a night out on the town with Reverend Flowers and the mind altering substances have taken effect," said Mr Cameron. The Prime Minister agreed to withdraw his comments, adding " I think it's very important that we can have a little bit of light hearted banter and a sense of humour on all sides."