A rise in flu and Covid cases is causing a shortage in small oxygen cylinders used in ambulances and A&E departments.
Ambulance staff are being urged to conserve oxygen supplies as a result, it has been reported.
The Health Service Journal (HSJ) said South East Coast Ambulance Service Foundation Trust have told employees that the shortage is due to a recent increase in number of patients with respiratory conditions and "the suppliers are reporting that this is higher than during the first wave of the Covid pandemic".