Mrs Annie ... regarding the empty seats. You'll normally find those for most concerts at the Royal ALbert Hall, which has a large number of seats which are owned by debenture holders. In order for them to be put up for sale (or even, I suppose to be given away) the debenture holder has to agree to that happening.This therefore means that for most concerts 100% of the seats are not going to be available for sale. So not a case of people obtaining the tickets and not turning up - more a case that they were never up for grabs in the first place.