Syria must answer for doctor Abbas Khan's death - PM
David Cameron has written to the mother of a British surgeon who died in a Syrian prison calling his death a "sickening and appalling tragedy".
The British prime minister criticised the "despicable treatment" Abbas Khan had received and said the Syrian "regime should answer for his death".
The body of Mr Khan, 32, was flown back to the UK on Sunday ahead of a post mortem on Monday.
His family say the death last week was murder.
Jonathan Blake reports.