This is the bit that intrigues me ( from today`s Times):
Vittorio Messori, a Catholic writer who co-authored books with John Paul II and Benedict XVI, said: “Friends in the English church have told me that it all started with Cherie’s faith. Gently, gently, she convinced him to go to mass with her so as not to separate the family on Sundays. He was struck above all by the liturgy. I found out about this 10 years ago.