Steve wrote in :

I don't recall seeing a single snail when I was a kid in the 60s and
70s, and even up until fairly recently (say the last 10 to 15 years) but
now they appear to be everywhere.


Well, where I grew up in the 70s (Swansea) there were loads of snails.

There still seem to be loads of snails: I haven't noticed an increase.

Possibly they have followed me from their South Welsh fastness, and I have
been inadvertently spreading them about the country.

If so, my belated apologies. ;-)


Victoria
--
gardening on a north-facing hill
in South-East Cornwall
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