Interesting that Michael Ball ( who topbills this concert) is now singing the role of Javert. Michael was the original Marius and also sang the same role in the 10th anniversary concert. Not very well known, but at the request of Cameron Mackintosh, he sang the role of Valjean at a special concert at Windsor Castle for the Queen and the Prime Minister of France who was there on a state visit. When Mackintosh wanted him to reprise the role at the West End, he declined saying it was not in his vocal range and recommended Alfie Boe for the role.
Btw, he has also done a cover of I DREAMED A DREAM in one of his musical theatre albums.