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If you put a data socket on the skirting board it will extend the zone onto the skirting board. It’s a high risk place to put a cable, but if it’s just for an Ethernet link or extension I wouldn’t even think twice about it personally.
At the end of the day, little harm will come from damaging it, other than inconvenience. Which is rather different to a live pipe or cable getting damaged.
Am I allowed to run ethernet behind skirting boards? And if I'm not, does it actually matter?