Questions were repeatedly raised in the press at the time about the propriety of her many commercial dealings; however, both Wilson and Williams successfully sued many London newspapers for libel. Later Harold Wilson publicly called for a Royal Commission of Inquiry into the press because of the defamation in the media, and that there had been a concerted smear campaign to de-stabilise his administration by MI5. Later these claims were partially corroborated by Peter Wright, former assistant director of MI5, in his book "Spycatcher". "Spycatcher" was banned in the UK by Margaret Thatcher's administration until a 1988 court case overturned the position.