Had occasion to look up False Widow Spiders and found this from the Independant:
Where did they come from?
The false widow spider is thought to have first come to the UK over 100 years ago in crates of fruit from the Canary Islands.
Where could I see one?
The spider has been established in Devon for a long time but recently climate change has caused the population to spread across the south east.
The spider is likely to spread northwards in years to come, according to the Natural History Museum’s Insect Information Service (IIS).
This year there have been a wide range of reports in the regional and national press, relating tales of spider-related terror from South Wales, Nottingham, Kent, Essex, Shrewsbury, Hampshire and London.
Sightings north of Birmingham remain rare.
So that settles it, then, what with Kent now being the same as the Canary Islands.