Recently found - this 1969 press photo. The byline reads:
1/10/69 London. Christine Keeler (left), whose name figured prominently a few years back in a scandal that rocked the British government attends a party in Chelsea 11/9 to launch a new book on the "Swingin' Sixties". With her is photographer David Bailey actress Penelope Tree and singer Marianne Faithfull (right).
The book was Goodbye Baby & Amen. A Saraband for the Sixties. The text was by Peter Evans and photos by Bailey.