At the end of Patti Boulaye’s autobiography, at the bottom of page 352, the sharp-sighted will spot some mysterious initials. After the final sentence – “For you, who have just read my story, I pray that all your prayers will be answered” – you will find the initials TTGOG.

“They stand for ‘Thank The Glory Of God’,” the singer and actress reveals, as she sips a fresh mint tea in the west London café where we’ve met to discuss her newly published book The Faith of a Child. “I deliberately put the message in code. I think it’s stronger when someone asks what the letters stand for.”