Hi Clive
I'll put one I found on ebay https://www.ebay.de/itm/131927219743 in just not to strain my wiring. It's an old house in the country here in Austria with a new distribution box wired up about 15 years ago which happens to be in the workshop as well so cable runs are not too long. A little peace of mind is worth the added expense for me.
Cheers

Andrew