According to the the Merlin Careers website, it seems that Alton Towers are considering introducing a virtual queue system to the park for 2021, as it's mentioned as part of the linked job description. Personally I hope it either a) doesn't get introduced at all, b) doesn't last long, or c) isn't compulsory. A number of us experienced mandatory Fast Lane at Walibi Holland last year, which was frankly awful and made the waiting times far longer than they would ordinarily have been. Additionally the rides that didn't have Fast Lane had physical lines far longer than usual considering everyone queuing for one of the 8 Fast Lane rides was also either wandering the park/sitting around/in a queue for another ride simultaneously. Considering the park seemed to cope last year with circa 10,000 guests a day, I don't really see why this is necessary. Perhaps they're just wanting to be seen to be doing something.