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Vickie Whorton from the West Midlands Ambulance Services says that although there are robust plans in place to monitor what is going through the doors of local hospitals to try and control the flow of patients, once A&E departments get busy the systems fails.
Figures released by almost all of the ambulance trusts cross England have shown that most have seen an increase in response times.
Only one trusts has managed to cut the length of time it takes an ambulance to respond.
See how your local service is coping with the full list of times.
Eleven of England's twelve ambulance services answered a series of freedom of information requests showing the average times it took an ambulance to respond from 211 until September 2013.
The East of England trusts showed the worst performance with times increasing by a minute and a half over the period (nearly 40%).
The Department of Health have told ITV News that ambulances services will receive £15 million to help as a squeeze on A&E departments is expected this winter.
The announcement comes after new figures show the average time it takes ambulances to respond has been going up in nearly all areas in England over the last three years - in the worst area the East of England service has seen times rise by a minute and a half.
Latest ITV News reports
A regional breakdown of response times for ambulances across England.
One of the biggest problems is that hospitals can't take the patients ambulances bring to A&E fast enough as they are already chockablock.