They would mostly seem to be self-evident but a recent spate of damaging behaviour suggests a reminder would be helpful. Here are five things to avoid:

1. Don’t leave litter
2. Don’t dig holes or light fires
3. Don’t climb on the stones.
4. Don’t paint or write or carve on the stones,

5. Don’t build a massive 4-lane motorway in the surroundings or hide the stones from tens of millions of people forever.