Formed by Noel Godin, notorious for masterminding a campaign to throw custard pies at the rich and famous, the party is called TARTE - a French acronym for a phrase meaning "All Drunk Let's Party Together".

Previous pie victims have included Microsoft boss Bill Gates on a visit to Belgium last year, designer Karl Lagerfeld, and American singer Kenny Rogers.

Political figures like Dutch Finance Minister Gerrit Zalm make up the majority of the hit list

The authorities have taken a dim view of Mr Godin and his supporters in the past however.

The two "entarteurs", or pie throwers, who caught Bill Gates with four, fresh cream tarts, Brian Keegan and Remy Belvaux, were found guilty of "mild violence" and fined almost $100.