There was frustration and anger in Gravesend today, at a meeting between public health officials and a group of mothers whose children have been born with the same birth defect.

At least eight children born on the same street in Northfleet have a rare bowel condition called gastroschisis. They aree convinced chemicals in the local environment are to blame. But health officials say tests have shown no direct link - and more research needs to be done. Andrea Thomas reports.