Experts are warning that the noble false widow spider, described as the most dangerous spider breeding in Britain, is set to invade homes this week following a surge in numbers due to recent warm weather. UK searches for 'how to identify a false widow spider' have increased by 5,000%, and NHS figures show hospital admissions for spider bites have more than doubled over the past decade.
Oxford University ecologist Clive Hambler stated that the days of treating spiders as benign in Britain are over. NHS data reveals that 100 people required hospital treatment for spider bites in 2025, up from 47 a decade ago.
The spike in sightings is attributed to prolonged heatwaves that accelerate breeding. As temperatures drop, the booming spider populations seek warmth indoors, squeezing through gaps around window frames, door seals, and air bricks. Garden expert Luke Newnes of Hillarys advised focusing on entry points, as most UK homes have not had these checked in years.
Common entry points include perished silicone seals, worn threshold seals, and gaps around window frames. Sheds, lofts, and items stored against external walls can also provide sheltered routes for spiders to enter homes. Experts recommend sealing gaps with exterior-grade silicone, installing brush strips under doors, and cutting back vegetation by 30cm from walls to reduce the risk of infestation.
