PERFORMANCE: London Ambulance Service Trust lost dozens of 999 calls after an IT problem caused by the switch from British Summer Time, it has been revealed.

Documents obtained by HSJ under the Freedom of Information Act show the service had to declare a serious incident after losing 71 calls on 30 October.

A technical review found that a fault in the call handling system after the clocks went back an hour had meant some calls did not appear on screen in the control room.

A spokesman for the trust said: “The issue was immediately identified by staff, and after 25 minutes was resolved by our technical team, who were able to account for all the 999 calls in the system.

“A clinical review of the calls that hadn’t been visible found no patients were in a life-threatening condition, but a few may have benefited from either an earlier response, or a ring back to make a further assessment.”

The incident followed a larger technical failure on 8 June, which saw hundreds of patients left waiting for hours.

On that occasion, CommandPoint software, provided by US company Northrop Grumman, failed after the trust tried to use it for the first time.

A review said the trust should have had a more detailed contingency plan in place.

One patient is taking legal action over the delay and another died, although a review found a quicker attendance would not have saved them.