The use of chlorine against Syrian civilians could lead to similar attacks elsewhere in the world, a scientist at the heart of new revelations into chemical weapons use has found.
Hamish De Bretton-Gordon - a British chemical scientist involved in testing samples from recent attacks for the Telegraph - said that such incidents could have a major "psychological impact".
More top news
It looks like another very warm day, with a maximum temperature close to 27 Celsius (81F).
The Prince of Wales is expected to be named a future head of the 53-nation body after receiving a public endorsement from the Queen.
Heavy artillery and airstrikes have been used to pummel Yarmouk, ITV News correspondent Dan Rivers reports.