The post you are reporting:
On the site I looked at, there is Folkestone and Hythe, but no Dover and Deal branch.
I think the updated version on the UKIP website, which under South East does not include Dover and Deal, is the one to go by.
The one Richard refers to is out of date. In fact, Mr Ron Beaton is no longer the treasurer, and when it says contact Dover and Deal, his name and email comes up, but he is no longer on the committee, having resigned, so I believe.
John Buckley is no longer the secretary either.
The UKIP branch that is advertised on the site Richard saw is out of date, and it's information no konger corresponds to reality.
This may account as to why the address is not present in the national UKIP website under the term: branches. It no longer exists!