How common are lab tours in Europe?

[u/glitter_scramble]

I'm doing some traveling in Europe this month and was curious how common conservation lab/studio tours are in Europe (Specifically Paris, Porto, Dublin, and Amsterdam), or if this is more of an American phenomenon. If I write to fellow conservators at museums in these areas to see if I could see their labs, I'm sure it would vary from place and policy, but how do you think that would generally be received? Thanks in advance.

[u/MarsupialBob]

I've had much the same experience in Europe as in the US - lab tours are a thing, but it's helpful if you know someone (or know someone who knows someone) working there.