If you can get beyond the credibility-stretching premise of Mrs Gary Breath, that a young, 21st-century British woman would organise a sham marriage before the deadline of her 35th birthday to prise £150,000 from her parents, then there’s still plenty to enjoy in Ellie Ross’ one-woman, broad social satire. As the unbetrothed sibling in a well-to-do family, she has a rewarding teaching job but in her peak child-rearing years without a partner in sight, and coming under significant pressure from her parents to settle down, Annie is archetypally recognisable.

Her mother and father are highly problematic, lavishing cash on their children’s love lives for their own peace of mind but they’re not outright monsters. More troubling is Owen, Annie’s long-term, platonic best friend who acquiesces to her plan to marry and split the money, justifying it as necessary for him and his girlfriend to get on the property ladder. And then there’s her best friend, who fumes and decries the indecent proposal but does nothing to actually obstruct the nuptials. With a game Ross playing all the roles, Annie is endearingly bewildered but also maddeningly oblivious to the practicalities of pulling the con off, with a true-love subtext never cultivated enough to really feature.

Mrs Gary Breath, Assembly Roxy, until 31 August, 4.40pm; picture: Rachel Sherlock.