Processionary caterpillar

Hi can anyone help?
I've attached some photos of a caterpillar I found that looks similar to a processionary
caterpillar. Can anyone confirm whether or not it is and if not what is it?




I'm in the south of France and found it in a stone barn; I
haven't seen any others. There has been a problem in the past with
processionary caterpillars.
Many thanks.




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Posts
We found a nest in our grapevine in Spain,and our neighbour (Spanish) pulled it down,poured petrol over it and set it on fire!! Not a recommended method I hasten to add.
It does look like one though.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
The Oak Processionary (which it isn’t either) is another concern. They nest in the bark, so you don’t see the telltale nest.