You have it John Walker, it is indeed Hole Park near Rolvenden.
Though the house was largely rebuilt/remodelled in the 1950's (and not open to the public as its still a family home) I thought the gardens and grounds were fantastic. Not large, but very well organised with many different garden areas and a pleasant woodland walk. I think you will both enjoy it.
Had to take the old Rolls estate as the Sunday trip Lamborgini was still being polished by the chauffer
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Over to you John Walker