Jane and Kev don't have secrets, there's no room for them. Their children take up all the space. Dirty laundry and weekend guests just have to be squeezed in. But when Kev comes home from a business trip with something on his mind, he starts a confessional chain reaction which has shattering consequences.
Describing the play in the Guardian, Michael Billington wrote 'Bullmore starts by showing a harassed mum, Jane, coping with two demanding children; what makes it funny is that the kids are played by stamping, shouting, rampaging adults. Jane's world is blown apart when her husband, Kev, returns from one of his business trips as a building safety inspector to announce that he's smitten with a member of his team. And right in the midst of domestic crisis, in comes Kev's oldest chum, Phil, a bachelor Scot whose relationship with a doolally handbag designer, Lorna, seems to possess the jazzy fervour hard to sustain in a 12-year-old marriage. We have been here before, but Bullmore refreshes a stock situation by her sharp eye and ear for the oddities of human behaviour.'
Mammals was first performed at the Bush Theatre, London, on 6 April 2005, in a production starring Niamh Cusack and directed by Anna Mackmin.