Gloucester Cathedral | Gloucester, England

Gloucester Cathedral | Gloucester, England

Hidden halos: Look out for Nearly Headless Nick or Moaning Myrtle and see where Harry and Ron hid from the troll in the spooky corridors of 1,300-year-old Gloucester Cathedral – one of 5 locations used for Hogwarts. It’s worth getting a tour guide to reveal some of the fascinating ways the cathedral had to be altered for filming. Electrical points were disguised under panels painted to look like the stone walls, whilst anything that would reveal the set as a church was concealed. For instance, halos on the stained glass figures in the cloister windows were covered with coloured plastic filter paper to blend in with the glass around it. For signs of the cathedral’s ancient past, you can enter a wooden door that leads down to the old crypt, said to be haunted by monks from the old Gloucester monastery.

Lacock Abbey | Wiltshire, England

Potions class: Lacock Abbey's Warming Room – which contains a giant cauldron – was Professor Quirrell’s Defense Against the Dark Arts classroom, whilst Professor Snape’s Potions Class was held in the Sacristy. It was in the abbey’s Chapter House that Harry stumbled upon the Mirror of Erised, which shows the heart’s deepest desire. And amid all that selfie wizardry in the lab, don’t forget to check out the abbey’s South Gallery. You can stand in the very spot where William Henry Fox Talbot took the world’s first ever photograph.