I quite like the stitched panorama as a way of recreating the sense of space/size, rather than using a wide angle lens. Which I couldn't take in to the site anyway!
Here are some of the panos I took. Difficult to choose a creation technique to reduce curvature, so I didn't bother. Click for bigness, 4k pixels wide jpg. The originals are up to 19k pixels wide, so I didn't put them up.
The stadium in daylight.
The velodrome.
Stadium at night.
The Copper Box with added Goalball
Eton Manor Tennis - built specially for wheelchair tennis and to be converted to an all weather games pitch afterwards.
The Riverside Arena. 7 a side football going on here. Also 5 a side blind football