Sounds good to me, I'd get a chance to pop to Lytham St Annes where I grew up.
BTW Can I suggest another venue. How about The Prescott Hill climb. I went a couple of years ago and they have sections cordoned off for different manufacturers. They did have one section for MG Rovers But I can't remember how many were there.
I took these photos to give you a feel for it...
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It truly is a fantastic day out for the family.
Edd