But as he stepped on to the landing he came to an abrupt halt, staring at the small window set into the double doors that marked the start of a corridor signposted SPELL DAMAGE. A man was peering out at them all with his nose pressed against the glass. He had wavy blond hair, bright blue eyes and a broad vacant smile that revealed dazzlingly white teeth.

‘Blimey!’ said Ron, also staring at the man.

‘Oh, my goodness,’ said Hermione suddenly, sounding breathless. ‘Professor Lockhart. ‘

Their ex-Defence Against the Dark Arts teacher pushed open the doors and moved towards them, wearing a long lilac dressing gown.

‘Well, hello there!’ he said. ‘I expect you’d like my autograph, would you?’