Flu activity is already increasing across England, with early October surveillance data showing a rise in positive cases. But is the 2026/27 flu season arriving earlier than expected, and what does this mean for individuals and workplaces?
At Fleet Street Clinic, we have already confirmed 5 cases of influenza through testing among our patients, earlier in the autumn than we have seen in previous years.
National surveillance data suggests a similar trend, making now an important time to think about flu protection ahead of winter.
What do the latest UK flu figures show?
According to the UK Health Security Agency (UKHSA), flu activity throughout September was higher than at the same point in any of the previous 4 winters.
The latest surveillance report, published on 8 October 2026, shows:
- Flu test positivity increased from 5% to 6.5% in early October.
- Young adults aged 18 to 24 had the highest influenza A positivity, reaching 28.1%.
- Flu-related hospital admissions remained at baseline levels, despite increasing activity.
Although flu levels remain relatively low, the upward trend suggests influenza is circulating earlier than usual. However, it is too soon to predict how severe this winter’s flu season will be.
What about this year’s flu vaccine?
Influenza viruses change over time, which is why flu vaccines are reviewed and updated annually.
The 2026/27 flu vaccine protects against three main influenza virus types: A(H1N1), A(H3N2) and B.
UKHSA has identified changes in circulating influenza A(H1N1) viruses, known as antigenic drift. While this may affect how closely the vaccine matches circulating strains, vaccination can still provide important protection against serious illness and complications.
It generally takes around 2 weeks for the body to develop protection following vaccination, so timing matters.
With flu activity already increasing, now is a sensible time to arrange vaccination rather than waiting until flu becomes more widespread.
What does this mean for employers?
For businesses, flu can mean more than individual illness. Staff absence can disrupt operations, increase workloads for colleagues and affect productivity.
Workplace flu vaccination programmes offer employers a practical way to support employee health and help reduce the impact of seasonal influenza.
Combined with good hand hygiene, appropriate ventilation and encouraging employees to stay home when unwell, vaccination forms an important part of workplace winter health planning.
Fleet Street Clinic offers seasonal flu vaccinations for individuals and corporate workplace vaccination programmes.
Whether you’re arranging your own vaccination or coordinating a programme for employees, our team can help you prepare for the winter months.
Book your flu vaccination with Fleet Street Clinic online or call 020 7353 5678.
Sources:
– UKHSA: National flu and COVID-19 surveillance report, 8 October 2026 (week 41)
– UKHSA: Flu vaccines for the 2026 to 2027 season
– UKHSA: National flu immunisation programme 2026 to 2027
Information reviewed 12 October 2026. Surveillance figures may change as further data becomes available.
