Developers say they want to turn the 77-acre site where Earls Court Exhibition Centre currently stands into a "new London district" by creating a High Street and 7,500 houses.
Earls Court was built in 1937 and is famous for hosting the Ideal Home Show and the Royal Tournament.
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They took a week-and-a-half to put up and cost £30,000.
The shop has been criticised by passers-by and in online forums for selling Union flag socks, chair and telephones.
Motorists have criticised Kingston Council after a new traffic restriction made over £500,000 in just one week.