Back in August, Red Bull Studios announced three secret September parties where both the line-ups and venue were going to be revealed 24 hours before each event. There was a huge emphasis on the secret elements tickets could only be purchased at the last minute. Taking place on September 9, 10 and 11th, the string of events were supposed to coincide with the launch of the London Night Tubes. Originally planned for September 12th, the launch of the night tube has inevitably been delayed following a series of strikes. Not wanting to put a good idea to waste, Red Bull have decided to…