Producers of Harry Potter and the Cursed Child have released a second round of dates with tickets now on sale to people registered for priority booking. A third booking period will be opened up on Friday when tickets go on sale to the general public.

Tickets for the first 4 months run sold out within several hours of going on sale this morning with many customers experiencing technical difficulties and complaining via Twitter of a “shambolic” booking process.

With over 175,000 tickets sold for the play by 7pm this evening, unprecedented for a theatre production, it’s little wonder their servers had a mini meltdown when 120,000 people started baying at the proverbial gates at 11:00GMT.

Billed as the “eighth Harry Potter story and the first official Harry Potter story to be presented on stage”, the two-part play designed to be seen on the same day makes its world premiere at the Palace Theatre in London’s West End next summer.

Picking up 19 years after the end of the final book, Harry Potter and the Deathly Hallows, the Cursed Child will focus on Harry and his youngest son Albus as he struggles with the weight of his families legacy.