I'm reading, or about to, the play 'Deep Blue Sea', and there's a potted history of Rattigan to start the book.
It includes these brilliant lines:
"...his ill-judged musical adaptation of French without tears, Joie de Vivre (1960), was a complete disaster, not assisted by a liberal dose of laryngitis among the cast, and the unexpected insanity of the pianist."
Excellent (emphasis mine). And a reference for those you playing at home:
The Deep Blue Sea 'Terence Rattigan' with introductions by Sean O'Connor and Dan Rebellato. NHB London.