The key feature of the new stadium is its partly retractable roof. When fully open it allows sunlight to reach the whole pitch--an essential element in maintaining the world-standard quality of the turf. In poor weather, the roof can be closed within 15 minutes, providing cover for all 90,000 seats.

The roof is supported structurally by a spectacular 440ft-high arch that soars over the stadium, providing a replacement for the old building's landmark twin towers. Architects say the stadium's geometry and its steeply raked seating tiers ensure that everyone has the best possible view; seats are larger than at present with more leg-room; the highest tiers are easily accessed via escalators; and a new concourse wrapping around the building allows easy circulation and provides formal catering for 10,000 spectators and informal catering for the balance of spectators.

To create an intimate atmosphere during football and rugby games, the stadium has been designed with seats as close to the pitch as possible. Yet it also has the potential to host track and field competitions, for which an elevated running track and athletics field can be installed above the pitch and the first few rows of seats, supported by pillars. Acoustic studies have been undertaken to ensure that the new stadium will recreate the distinctive 'Wembley roar'.