Glastonbury festival organisers have urged fans not to use automatic page-refreshing apps such as Refreshinator to secure tickets.

Coach tickets for the UK’s most famous music event went on resale today (Thursday), with general ticket resales to begin on Sunday.

All 135,000 general sale tickets for the event were snapped up in less than an hour when they went on sale last autumn, with 15,000 coach tickets taking just 23 minutes to sell.

With demand high, many fans used page-refreshing apps such as Refreshinator to help beat online queues. Refreshinator, created by Batlabs UK, continuously refreshes the ticket holding page, until the user is connected to the purchasing page. Once connected, it alerts the user with an alarm, meaning customers don’t have to wait by the phone.

However, Glastonbury officials have told fans that their order could be invalidated by using Refreshinator, and, according to Somerset Live, asked them to “play it safe”.

They also said page-refresh apps could cause the website to crash, that fans could miss a slow-to-load page and that the £1.99 spent on Refreshinator could actually be a waste of money as some browsers offers free refresh apps.

“Glastonbury could potentially invalidate your ticket order if the website catches you using an automatic page-refreshing app,” organisers told Somerset Live. “In their terms and conditions, it states that “Glastonbury Festival will cancel all bookings made using multi-hit software or applications to ensure everyone has a fair and equal chance of getting a ticket.”

“The developers of the app have warned that if too many people use the Refreshinator app at the same time, it could slow down the official ticket site and could even cause the website to crash.”

The creators of the Refreshinator admitted to Somerset Live last year that the app could slow down the Glastonbury website.