I’m pretty sure that’s a Lime Hawkmoth caterpillar. If it was on the ground it’s looking for somewhere to turn into a chrysalis before emerging next year as a really beautiful moth https://butterfly-conservation.org/moths/lime-hawk-moth
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
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https://butterfly-conservation.org/moths/lime-hawk-moth
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.