Students leave pencil marks on ancient sculptures at the British Museum

The British Museum has more than 50 incidents a year of pencil graffiti on its ancient sculptures. The London museum uses the term graffiti to refer to any marks drawn by visitors (not just written letters), and in most cases they are accidentally applied, usually by schoolchildren. Pencil is removable, but with one case a week, this raises serious concerns about the protection of the collection and the way the galleries are monitored.
A Freedom of Information request on damage to works of art w