Passage: During the time he was studying the Qur'an, Stevens began to identify more and more with the story of Joseph, a man bought and sold in the market place, which is how he said he had increasingly felt within the music business. Regarding his conversion, in his 2006 interview with Alan Yentob, he stated, "To some people, it may have seemed like an enormous jump, but for me, it was a gradual move to this." And, in a Rolling Stone magazine interview, he reaffirmed this, saying, "I had found the spiritual home I'd been seeking for most of my life. And if you listen to my music and lyrics, like "Peace Train" and "On The Road To Find Out", it clearly shows my yearning for direction and the spiritual path I was travelling."Stevens formally converted to the Muslim faith on 23 December 1977, taking the name Yusuf Islam in 1978. Yusuf is the Arabic rendition of the name Joseph; he stated that he "always loved the name Joseph" and was particularly drawn to the story of Joseph in the Qur'an. Although he discontinued his pop career, he was persuaded to perform one last time before what would become his twenty-five-year musical hiatus. Appearing with his hair freshly shorn and an untrimmed beard, he headlined a charity concert on 22 November 1979 in Wembley Stadium to benefit UNICEF's International Year of the Child. The concert closed with his performance along with David Essex, Alun Davies, and Islam's brother, David Gordon, who wrote the finale song  "Child for a Day".After a brief engagement to Louise Wightman, Islam married Fauzia Mubarak Ali on 7 September 1979, at Regent's Park Mosque in London.  They have one son and four daughters and nine grandchildren; a second son died in infancy. They currently live in London, spending part of each year in Dubai.

Question: Where do their children currently live?
London