An opportunity to get Jag lovers in one place, talk about cars, talk about Jags - generally a chance to meet like minded individuals regardless of age or model - or for that matter make of car.
The Heritage Motor Centre makes a good venue as it is reasonably central for most commutes (obviously some more than others :D), but more importantly it's a great venue, their museum and restauant. And I believe there are a number of Jags on display moved across from the Jaguar Heritage Museum.
If there is enough interest, it may be possible to negotiate a group concession.