It is a bit ambiguous. I think it is £45 if you have that brand of car, or £50 for hoi poloi. I don't think membership is policed.
The website (ambiguously) says, "To join the paddock, you must be the owner of a model from your selected marque and will be prompted to enter details of your car...
I did search to see if MA53RZF was available when I was looking a registrations a years ago, but no joy. But there are many other MA53R-- options available.
South West people might be interested in this:
https://www.sportsmaserati.com/index.php?threads/masters-of-motoring-1-2-june-2024.38068/#post-1012464
Bowood House - Masters of Motoring - Sunday 2 June
A little bump for this. I know a couple of people who are going, but I can't make it.
Bowood House & Gardens On Sunday 2nd June 2024
The Masters of Motoring is set to return to Bowood House & Gardens on Sunday 2nd June 2024 and now includes a live track action day on the Saturday 1st June. You...
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This is a concern. @safrane do you know something the website doesn't? Or do we need to divert to Jolly Nice?
https://maps.app.goo.gl/s12hngxDc6BxwvNP9