I've just read something on the Beaulieu site that's quite interesting, let me copy/paste...
Vehicle Entry
Entry into the Beaulieu Parkland with your classic vehicle is from 9.30am – the Brabazon Restaurant will be open for bacon rolls, cakes, teas and coffee.
Please note that if you wish to park alongside your friends, or fellow club members, you must arrive together as there will be no designated areas available.
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This would suggest that the only way of getting the C5's together will be by doing a car park meet up first, if entry is from half 9 should we plan a half 9 meet?