Surface-to-air missiles could be deployed at two Lea Valley sites during the Olympics says the Ministry of Defence.

The Bow Quarter residential block, once Brant & May, was revealed as one site yesterday.

The other is the William Girling Reservoir which lies on the east side of the Lea Valley Walk between Ponders End and Tottenham Marshes.

These potential locations for ground-based air defence systems will be part of a major exercise in which security preparations are being tested from May 2 to 10.