Bill married his second wife, Sue, back in the late seventies or early eighties. She is a smashing lady too. They have two daughters. One of them is Kelly, after whom the gorgeous slide guitar instrumental "Kelly's Blues" is named. Bill is now living in Yateley and he plays at various places in the South of England under his stage name of Sonny Black. You can find his MySpace site under that name.
As you know Bill from back then, you may well also know Chris Clarke, Howard Fullbrook, Mike Cooper and some of the others, who have turned up here on this thread. Indeed I may have known you personally if you were around the Reading scene in the mid seventies. If you join Mudcat (free and it takes a minute), you can contact people directly via PMs. Howard, in particular, has been very generous in sending me some smashing recordings of various stages of Bill's musical career. Bill stopped playing his own beautiful songs a long time ago, but he still sings and plays beautifully and has developed from a very good guitarist into something of a guitar virtuoso in the meantime. As others here have attested, he is a good bloke too. But you knew that already!