Founded in 1948, the National Health Service (NHS) is a source of huge pride for many Britons who are able to access care for free from the cradle to the grave.
But tight budgets, an ageing population and increasingly complex medical needs have combined in recent years to leave many hospitals struggling during the winter season, sparking headlines about patients being left to wait on trolleys for hours or even days.
In a statement on its website next to appeals for help in Yemen and Syria, the British Red Cross said it was now "on the front line, responding to the humanitarian crisis in our hospital and ambulance services across the country".
"This means deploying our team of emergency volunteers and even calling on our partner Land Rover to lend vehicles to transport patients and get the system moving," said Mike Adamson, chief executive of the British Red Cross.
The NHS has always been an emotive issue in Britain - one of the richest countries in the world - and was once described by a former finance minister as the "closest thing the English have to a religion".
In recent years charities and opposition politicians have warned that government cuts to social care have resulted in more elderly and vulnerable patients being treated in hospital rather than at home, putting a huge burden on the service.
The Red Cross said it was working alongside the health service to support people in their homes to free up beds.
"Weve seen people sent home without clothes, some suffer falls and are not found for days, while others are not washed because there is no carer there to help them," Adamson said.
A spokeswoman for NHS England said plans were in place to cope with increased pressure during the winter and that beds were not as full as this time last year.