Election chief Lucy Powell planned to mingle with stars at Brits pre-party . But Chief Whip Rosie Winterton ordered her to stay at Westminster for vote . Ms Powell , 40 , backed down but still made it to music awards main event . The Prime Minister is expected to be in the audience on Saturday night and will watch proceedings from a private box.
Election chief Lucy Powell planned to mingle with stars at Brits pre-party . But Chief Whip Rosie Winterton ordered her to stay at Westminster for vote . Ms Powell , 40 , backed down but still made it to music awards main event . Insiders say row brought simmering tensions between the contrasting pair .