From the OP seems quite restrictive if they want to use the word Sussex....
'The new status will limit the grape varieties that can be used to make Sussex wines and will insist upon hand harvesting and lower yields in vineyards, ensuring that only the best grapes are used. The stricter...
You'll have to educate me (and possibly others, I'm sure I'm not the only one) what does this protection offer that is good for Sussex and that others not in Sussex would be unhappy about/jealous of ?