One of the fundamental principles of European justice will be temporarily suspended during next year’s London Olympics to protect the commercial interests of sponsors, if Government proposals are accepted by Parliament later this year.

Under the plans, anyone suspected of so-called “ambush marketing” or unauthorized trading near the Olympic Park during the Games would be presumed guilty until proven innocent – a clear contradiction of the European Convention on Human Rights.

The Department for Culture, Media and Sport (DCMS) believes the move is justified to facilitate the staging of the Games, which it describes as a “once-in-a-lifetime occasion”.

Regulations proposed by the DCMS state that an interference with the right to be presumed innocent “will be justified” as long as it is confined within reasonable limits.

Streakers who use their bodies to advertise during the Olympics could face a £20,000 [$32,000] fine under new rules.

The London Olympic Games and Paralympic Games Act 2006 is being tweaked to target people who attempt marketing stunts during the tournament.

A man invaded a diving event at the Athens 2004 Olympics with a brand daubed on his bare chest.