Eddie and Bernice Kozlowski from Nottinghamshire both developed swelling and sore itchy lumps after being bitten by a venomous spider - despite living for nearly 20 years in Australia, and escaping all the country's creepy-crawlies.
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Rescue teams arrived at the scene to find the two men standing on top of their car roof.
Rain and low cloud will clear to the south leaving a dry night with light winds.
Winds to ease through the evening allowing temperatures to fall steadily with a widespread frost developing.