There is an article on the Daily Mail website about these OPM caterpillars which sound very unpleasant, take care if you come across them.
https://www.dailymail.co.uk/news/article-12004063/Health-warnings-toxic-hairy-caterpillars-cause-rashes-asthma-attacks.html
But I am sure that is a photo of cabbage white caterpillars!
Round here we get pine and oak processionary moths and yes, that photo is wrong.
This is an article from a local paper, translated into English, presumably by Google hence the amusing "brown ass moth" -
https://actu.fr/pays-de-la-loire/les-sables-d-olonne_85194/vendee-ouvrez-loeil-les-chenilles-processionnaires-peuvent-aussi-envahir-les-chenes_59137066.html?fbclid=IwAR3Wf63HaK4ysb4tj9CNg29zyMRln6fsNFDBYQu7QDYK0Ug3CkGgJxydZxg
Thanks Obelixx that is an interesting article and good to see a photo of the real thing! Worrying though the spines remain in the wood and from the way it is worded still can cause an allergic reaction!