The trial of the app has been running for two months in England

A new app allows air ambulance services to view patients before they arrive to treat them. It is being trialled in two areas of England, BBC reports.

The GoodSam app sends a link to the 999 caller's mobile phone, which opens live streaming.

It enables medics to assess how seriously ill a patient is before setting off.

Time is critical in saving a person's life or reducing long-term disability, and often we have limited information from bystanders about a patient's or multiple patients' injuries to make decisions, commented prof Richard Lyon, associate medical director of Kent, Surrey and Sussex Air Ambulance.

The data doesn't remain on the patients' mobile phone.

It only streams when they give permission and then once streamed it has gone", explains prof Mark Wilson, medical director of the company which made the app.

The trial of the app has been running for two months. The company do not yet have hard data on results.