In a video diary entry as part of his work with Syria Relief, a UK based charity coordinating a number of activities inside Syria, UK surgeon Dr David Nott, described the "intensely difficult" conditions medical staff were forced to work under.
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The Duchess of Cambridge has been on maternity leave since the week before Easter.
The Duke and Duchess of Cambrige have been together for 15 years and will have three children under the age of four.
News of William and Kate’s third child was announced on September 4 and the duchess went on maternity leave on March 22.