Ancient Greek geography of Britain

former island in Kent, England

The Cassiterides (, meaning "tin place", from , kassíteros "tin") are an ancient geographical name used to refer to a group of islands whose precise location is unknown, but which was believed to be situated somewhere near the west coast of Europe.

Ictis () was a British island described as a tin trading centre in the Bibliotheca historica of the Sicilian-Greek historian Diodorus Siculus, writing in the first century BC.