John Sawers' suitability to head Britain's Secret Intelligence Service is being questioned in light of his wife's disclosures on Facebook, sources said.

Sawers is Britain's ambassador to the United Nations. In November, he's scheduled to become chief of MI6, Britain's spying operations abroad.

Last month, Sawers' wife, Shelley, posted dozens of pictures, with captions, to her account on Facebook showing where the Sawers live and work, who they call friends and where they all go on holiday, The Sunday Telegram reported.

The material was removed from the site after the Telegraph alerted the British Foreign Office to the photos and their details, the newspaper said.

Senior political leaders reportedly said Shelley Sawers' actions raised doubts about her husband's suitability to lead the intelligence service, the Telegraph said.

Edward Davey, a Liberal Democrat and a member of Parliament, has called on Prime Minister Gordon Brown to investigate whether the Facebook disclosures have compromised Sawers, the Telegraph reported.