The company has been working closely with Val Cameron, the island's shadow water regulator and director of environmental health and pollution, to put together the case.

BBC: Guernsey

The company has decided against making it even stronger, says Rich Walker, Shadow Robot's technical director, because that might be dangerous.

ECONOMIST: Monitor: Very handy | The

"We all live in Mr Punch's shadow and what a strange shadow it is, " laughs Mervyn Millar, UK director of Handspring - the puppet company behind War Horse, which is soon to unveil a new show Crow based on the poems of Ted Hughes.

BBC: Mr Punch celebrates 350 years of puppet anarchy

The British director was 24 when he made the 1923 silent film, The White Shadow.

BBC: Rare Alfred Hitchcock film footage uncovered