This voucher is valid for a family of four, including two adults and two children. Each experience is available week round, year round. ArcelorMittal Orbit: Walk-ups are accepted. To descend the platform, you may choose between the lift or external staircase; coming down by the stairs may take up to 20 minutes. London Stadium: Entrance times vary please enquire when booking. Tours are generally self-guided but depending on events on the day, may be partly guided. All dates are subject to availability.