Can I purchase additional seats next to a previously made order? To check the availability of seats next to a previously made order, please contact our call centre on 0800 111 999. Related articles Can I purchase additional seats next to a previously made order? I've made an incorrect booking. What can I do to amend this? Can I upgrade my tickets? Can I exchange my tickets to another performance? I requested my tickets to be posted, however my tickets have not arrived. What should I do?