The Conservative Party in Britain failed to secure access to a multi-million-pound bequest when a judge ruled today the benefactor had been deluded.
Branislav "Bane" Kostic, who died aged 80 in 2005, was not of sound mind when he wrote his will, Mr Justice Launcelot Henderson ruled in the High Court.
The Belgrade-born millionaire who emigrated to Britain in 1964, had cut his only child out of the will in favour of the party, the court had heard earlier.
The trading company tycoon had thought former prime minister Margaret Thatcher "the greatest leader of the free world in history" who would save the world from "satanic monsters and freaks" conspiring against him.
The judge ruled that he lacked the "the proper appreciation" when he cancelled an earlier will that left an £8.2 million fortune to his son Zoran (50) - a bequest now believed to be worth over £10 million.
During a July hearing, Zoran had claimed his father lacked so-called testamentary capacity to write the will because of his paranoia.