It's unusual for Ticketweb to sell accessible seating for most events. If ever we can provide a booking facility for accessible seating the event itself and ticket description will clearly state this. If we have any information on the arrangements for a particular event we'll post an answer on our help desk so you can take a quick look there. It's usually the preference for the venue or event organisers to handle these bookings themselves so we always recommend contacting them directly in the first instance.