The Ministry of Defence says that similar missile defence systems have been deployed at all recent Olympic Games.
They will be in place by mid-July, along with Royal Navy helicopter carrier HMS Ocean (which will be moored in the River Thames), Royal Air Force Typhoon jets (which will be temporarily stationed at RAF Northolt), and Puma helicopters (at a Territorial Army centre in Ilford).
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A group of 19 of the original 1978-1982 cast met to watch the musical's West End comeback starring TV's Miranda Hart.
Fire crews were called to the 66-year-old's flat in Leatherhead, Surrey after the fire spread from the disposable barbecue.
The operation carried out by Westminster City Council led to the seizure of £8,000 worth of cigarettes.