The Druids were the priests of the Celts in early England.
A group of Druids worshipped Cessair as the goddess Cailleach. They met at the Nine Travellers on Boscombe Moor. (TV: The Stones of Blood)
King Prasutagus defended the Druids of Anglesey from the Romans, but died of the wounds he received in the battle. (PROSE: Good Queen, Bad Queen, I Queen, You Queen)
The Fourth Doctor and Leela encountered the Druid Cunovellasus. (PROSE: The Prodigal Sun)
In 1976, the Vardans disguised themselves as Druids at Stonehenge. (PROSE: No Future)
Druids were also present on Tír na n-Óg. Caeryon was the High Druid of that world. (PROSE: Cat's Cradle: Witch Mark)