The stage version, at London's Adelphi Theatre, has been reworked by Alexander Dinelaris putting Headley's Rachel Marron at the centre of the action and beefing up the role of Rachel's sister, and loverival - while also highlighting Houston's own canon of songs.
She tells us about Milton's recovery from a by-pass operation, about their daughter Janet's interest in boys ballooning to rival her love of horses, of how their son David became a devotee of Kipling during his father's year at Caius College, Cambridge.
It has been left behind in hot areas such as search and social networking by younger companies, some of which love to thumb their noses at their older rival.
He has been at pains to avoid publicly clashing with younger brother Ed, insisting their "brotherly love" will survive the contest - even as it became increasingly apparent that Ed was his main rival for the Labour crown.