London is being hit by an unprecedented flu wave with cases already at a record high, NHS chiefs are warning.

They also stressed that there was “no peak yet in sight” as the virus sweeps through the capital.

They issued an urgent appeal to Londoners to get vaccinated after a tripling of flu hospitalisations in the city.

The flu mutation sending cases spiralling in London is more contagious than variants of past years, according to health sources.

A 'drifted' influenza A(H3N2) strain, also now known as 'subclade K' or 'superflu', is dominating cases.

The health bosses also warned that hospitals in the capital will come under the double pressure from the flu crisis and resident doctors, previously known as junior doctors , walking out in their latest strike in the run-up to Chri

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