Alton Towers will not open some rides – including two of its most popular rollercoasters – until an hour later at 11am for the rest of this season.
Thirteen and Air attract some of the largest queues at the Staffordshire theme park, but will open for as little as five hours per day under the new procedures.
Most rides at the park open at 10am, with some opening an hour earlier as part of the Early Ride Time offering to those with pre-booked tickets as well as hotel guests.
Water rides have opened at 11am for some time, but will now also be joined by the two rollercoasters, Duel dark ride and Skyride cable car system.