I'm just off the phone with Lumley Special Vehicles to move all my "special" vehicle insurance (one car, two bikes) from Shannons to LSV.
They asked me if I was a member of a club, and I said "sort of" and explained this place, what we were about and how we started.
He's added Mustangtech to their system, and anyone that mentions they are a member here will receive a discount.
I did not get any more of a discount for doing this - I just got the same "member" discount as anyone else would get.
But they were certainly cheaper than shannons (by 20-25%), so it's worth giving them a call to compare.