Alan Williams, the consultant pathologist whose failure to disclose the results of microbiological tests on one of Sally Clark's two baby sons led to the quashing of her murder convictions, lost his High Court appeal last week against a finding of serious professional misconduct.

Mrs Clark was convicted in 1999 of killing babies Christopher and Harry but was cleared on appeal in 2003 after spending three and a half years in prison. She died earlier this year at the age of 42. A coroner ruled this week that the cause of her death was acute alcohol intoxication.

A General Medical Council fitness to practise panel found …