From support.londoneye.com: The Coca-Cola London Eye is fully accessible. However, due to health and safety we are only permitted to allow entry to two wheelchair users per capsule and eight on The London Eye at any one time. Therefore to avoid disappointment, we strongly recommend booking your tickets in advance. Please note, we're unable to make on the day bookings for wheelchair slots. For on the day visits, please speak to our onsite team to discuss the remaining availability. During peak times time slots do sell out quickly and therefore strongly recommend pre-booking in advance.