We’re not in the theatre. We’re eavesdropping on a marriage. We’re utterly involved in the forty years that Billy and Maggie have shared together.

Such is the power of Abi Morgan’s play and such is the ability of the four stars involved that we identify completely with every word of it.

Our hearts flutter nervously as young William over-reaches borrowings for his dental practice or when Margaret nearly strays: when Mike Skinner as older Bill tears off the post-it instructions that his dying wife leaves on the fridge, the only sound from a petrified audience was the rustling of handkerchiefs.

Ann Atkins was as perfect as her younger counterpart Cicely Whitehead, both portraying calm acceptance of what life would bestow or withhold, their merest gestures and facial expressions conveying what words could not. Dentist Mike Skinner never quite outgrew the romantic hothead of his youthful Frank McHugh: real men, strong and childish.

Stunning drama with mime and music in a one-act, no-interval play - directed by Steven Adams and Tess Gill - demonstrating that nothing is more extraordinary than what might seem very ordinary indeed. Or that teeth last forever – and so does love.