Madonna has lobbied the Government to use a "mystical" Kabbalah fluid to clean up radioactive waste, according to reports.

The superstar is a follower of the Jewish spiritual movement which believes water can receive magic healing powers through "meditations and the consciousness of sharing".

Together with husband Guy Ritchie, she approached Downing Street, the Department of Trade and Industry (DTI) and British Nuclear Fuels (BNFL) with the idea, The Sunday Times reported.

It is understood she was promoting a water-based solution that had allegedly proved successful in neutralising dangerous nuclear waste in Russia.

Film director Mr Ritchie was said to have called BNFL and written a series of letters accompanied by scientific papers. BNFL looked into the theory but could find no scientific basis for the claims.

One executive told Mr Ritchie the scheme defied the laws of physics. Downing Street said it does not comment on matters of "private correspondence".