<p>Kelly Macdonald says she is "much happier in an ensemble" cast like Operation Mincemeat rather than taking centre stage, like in her Line of Duty interrogation scene.</p><p>The 46-year-old told Yahoo that her guest lead role in the blockbuster BBC crime series was "challenging but very rewarding", despite the intense pressure.</p><p>Operation Mincemeat is in UK cinemas from 15 April.</p>
