Ambulances 'queuing for hours' at A&E departments
10 August 2014 Last updated at 07:39 BST
About 300,000 ambulances were left queuing outside hospitals in England last year with patients waiting to be seen in A&E, according to data obtained by Labour under the Freedom of Information Act.
The longest recorded delay was more than eight hours, despite the 15-minute nationally agreed standard.
The Department of Health said long waits were "unacceptable" but numbers had fallen over the past year.
Adam Brimelow reports.