Originally Posted by The_Architect
IIRC the Olympic Stadium here is temporary (or at least partially temporary) whereas the Beijing one was permanent. The Aquatics Centre is permanent, but the white "wings" on the sides of it are temporary. Other than that I think the Water Polo arena and Basketball Arena are temporary as well.
Olympic Park Venues - Permanent
Copper Box, Handball Arena (7,000)
Olympic Park Venues - Permanent with Temporary Additions
Olympic Stadium (80,000 > 25,000-60,000)
Aquatics Centre (17,500 > 2,500+)
Eton Manor (10,000 > TBC)
Olympic Park Venues - Temporary
Basketball Arena (12,000)
Riverbank Arena 1 (15,000)
Riverbank Arena 2 (5,000)
Water Polo Arena (5,000)
Across London and the South East there are a whole host of entirely temporary venues (Greenwich Park for Equestrian, Royal Artillery Barracks for Shooting and Horse Guards Parade for the Beach Volleyball), and utilisation of existing venues or sites (ExCeL, the O2, Lord’s Cricket Ground, Wimbledon, Wembley Arena, etc...) with various amendments or temporary seating. You then have all the football stadia across the UK, including Wembley in London
Outside of the Olympic Park, only the Lea Valley White Water Centre and Weymouth & Portland National Sailing Academy are permanent.