Lively, low-budget Brit-flick, with the excellent Helen McCrory as Scottish mum Bernadette, who ups sticks to London on the trail of wandering hubby John Hannah. But, realising that she and the little 'uns don't actually figure in his plans, Bernadette embarks on a one-woman-and-three-kids crime spree, with determined detective Toni Collette (star of "Muriel's Wedding") in hot pursuit. Completely implausible but endearingly entertaining.