The armed forces have played a big role - the TA supplying much of the military’s communications network.
The 94 Signal Squadron has been planning and rehearsing for a year, ready to link up the Olympic and security venues around London and Weymouth.
The TA recruits men and women aged 18 to 43.
Anyone interested in the TA at Windsor can ring 01753 860600 to find out more.
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Trains travelling to and from London Paddington are facing 'major disruption' this afternoon, with some services set to be delayed by up to an hour, cancelled or revised.