It’s interesting that they are choosing to do this. Parts availability and degrees of originality are a bit of an impasse, it’d be more interesting for most owners of 20+ years old cars if they looked at the value of the car and tried to do something to somewhat align part costs with that. I’m not saying, your average 4200 is £10k so parts costs should be in line with a £10k car, more than things like clutches or brakes should be obtainable and not 15%+ the value of the car!
Whether the cert adds value to car surely has to depend on how well the certification process is judged. If it’s too easy to get, it’s pointless and adds no value. If it’s too hard, perhaps it’ll add value to the best of the best, but it won’t raise the desirability of the make / model so you end up with a very expensive niche within a niche, and of course thats if it even passes.
The concept is good, but it needs the full infrastructure, local dealers to help guide you, parts availability, perhaps including used, via main dealers, owners to pony up a wad of cash for it. Imagine going all the way to Italy with your car only to be told that it’s failed as that rivnut you used to repair an inner wheel arch liner isnt factory spec..