Via the Daily Telegraph, this looks encouraging:

โ€œThatcher: The Musical looked as if it would sink faster than the Belgrano, torpedoed by its own ineptitude. But one emerges from this enjoyable romp through the life and times of the Iron Lady grateful that someone in the theatre world has finally had the decency to acknowledge her seismic role in British politics, having had some affectionate laughs at the expense of her nation-changing ambition.โ€

And reading this comment reassures me that the old country has not lost its, well, you pick the noun:

โ€œThere are some lovely vignettes when the cast, cross-dressed in bowler-hats and pinstriped suits, cluster around their leaderine like drones round a Queen Bee.โ€

Marvelous.