Of the 19 shown, a couple might have you wondering why they did not make the film - particularly the introduction of Lucius Malfoy in Diagon Alley.

BBC: Potter DVD unlocks more secrets

There are tours of the Lockhart classroom and Diagon Alley which are good, although if like me you would have preferred a livelier voice over on the first Potter DVD release you may be a little disappointed.

BBC: Dobby the house-elf

"I am prouder than I can say to be given the freedom of the City, which, on top of all the known benefits - and few people realise this - entitles me to a free pint in the Leaky Cauldron and a ten Galleon voucher to spend in Diagon Alley, " she joked.

BBC: Jessica Ennis