SIR – Reading Helen Mead’s column about spiders (T&A, November 9) reminded me that a few months ago the BBC announced in a news broadcast that poisonous spiders, probably brought from the tropics in the hold of a ship or aircraft, are surviving and reproducing in Britain.

Not exactly music to the ears, but worse still, if climate change continues, experts warn us that even the UK’s harmless scorpions could become venomous arthropods.

Arachnophobics, and indeed some entomologists, might accuse me of being a Job’s comforter for these disclosures, but at least they give some credence to environmentalists who claim that unless we reduce CO2 emissions heaven knows what may befall this green and pleasant land.

D Rhodes, Croscombe Walk, Bradford