"Wally" wrote ..
Pulling weeds from around my peas today and
saw a beetle that I had never seen before.
(probably because I'm new to veg growing)

It was green, about the same shade of green as the peas,
about 10mm across and very flat, looked a bit like a tiny green crab.

Anyone recognise the description ??

Green Beetles...
Rose Chafer
Tortoise Beetle
Mint Leaf Beetle

But I suspect a Green Shield Bug (Palomena prasina)

--
Regards
Bob Hobden