Harry Potter author JK Rowling has been trolled for asking Corbynistas to stop comparing their elderly, bearded leader to Dumbledore, the heroic headmaster in her best-selling series of books and films.

Although they are both older gentlemen with white beards who command an enthusiastic group of youngsters, the author thinks that this is where the comparison stops.

She tweeted, saying: "Corbyn. Is. Not. Dumbledore.", linking to an article which points out he was paid up to £20,000 for appearances on the Iranian state broadcast network Press TV.

This channel was banned in the UK for its part in filming the detention and torture of an Iranian journalist.