Environment & Climate

Invasive tropical mosquito found breeding in east London for first time

Health officials report Aedes aegypti breeding in London homes but assess the current public health risk as low.

Updated Sep 3, 2026 · 13:18 UTC1 reports

The short version

Aedes aegypti mosquitoes, which can carry dengue, chikungunya, and Zika, were detected breeding inside east London homes.
This marks the first confirmed UK breeding incident and the fourth detection of the species in the country.
Health authorities stated the public risk is low with no human infections reported, and control measures have been deployed to eliminate the larvae.
Experts note the species is not yet established because of the cold climate, but warmer temperatures increase the likelihood of future incursions.

The UK Health Security Agency (UKHSA) detected Aedes aegypti breeding in homes in east London, marking the first time the species has been found breeding in the UK.[The Guardian]
Aedes aegypti can transmit tropical viruses including dengue, chikungunya, and Zika in regions where those infections circulate.[The Guardian]
The UKHSA assessed the risk to the public as low, noting no evidence of human infections resulting from the east London detection.[The Guardian]
Authorities implemented larval eradication measures and advised local residents to drain standing water from outdoor containers, paddling pools, and plant pots.[The Guardian]
According to the UKHSA, the species is not established in the UK as typical British temperatures remain too cold for long-term survival, though a warming climate increases the risk of survival.[The Guardian]

The precise pathway through which the mosquitoes entered east London remains unconfirmed, though UKHSA cited vehicles, luggage, and imported plants as possible vectors.[The Guardian]