Mari-Simon Cronje died while celebrating a friend's birthday in September 2010 after she fell from the banana boat. She died from severe leg injuries after falling into a lake at the Prince's Sporting Club in Bedfont in west London.
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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.