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Replying to a point made about changing at St Pancras to get to Heathrow, Gatwick. You would still have to get across London to Victoria by bus taxi for Gatwick.
Heathrow, same to Paddington, then Heathrow Express.
Cross Rail would make a transfer for Heathrow and Stanstead very easy but it's not due till 2015.
A transfer from Stratford International for the games in 2012 from Ramsgate just over an hour.
Manston would be ideal for visitors to arrive in the UK for the games, and visit the City of Canterbury