According to the Museums Association, "In 2001, free entry was reintroduced at national museums in England, Scotland and Wales which had previously charged for admission." http://www.museumsassociation.org/campaigns/free-admission-and-the-lottery As I have already said, this applies only to National Museums. Presumably the LONDON Transport Museum doesn't count as a NATIONAL museum - as it is specifically about London. OK now, Dvn?