Health Secretary Wes Streeting voiced "genuine fears" for the NHS, stating current flu pressures are the worst since the Covid-19 pandemic.
NHS England anticipates that more patients will be affected by the strike, with some appointments inevitably requiring rescheduling.
NHS leaders have issued an urgent plea for the public to get flu vaccinations, while the British Medical Association (BMA) criticised the government's "hurried, last-minute offers" and called for a long-term resolution.