<Li> The Paleolithic period of archaeology </Li> <Li> The geologic Pleistocene--Holocene boundary (modern climate) <Ul> <Li> Mesolithic or Epipaleolithic period of archaeology </Li> <Li> Neolithic period of archaeology </Li> </Ul> </Li> <Ul> <Li> Mesolithic or Epipaleolithic period of archaeology </Li> <Li> Neolithic period of archaeology </Li> </Ul> <Li> Mesolithic or Epipaleolithic period of archaeology </Li>

When did the stone age began in britain