That was the reason why I started the thread to be honest.
As far as I can tell actually Anonystude is correct for your normal pilot.
When you start operating regularly into these fields you can get dispensations from the NAA for lower minimums after providing them with performance figures etc. These can also include additional allowable references which are then documented in the company airfield brief.
For example I wouldn't be suprised if the lit mast on the shore of the Fjord was somehow involved in the approach for local operators.
In scotland there are several instrument approaches which arn't even public on the AIP site. But companys can apply and be allowed to use them by the airfield operator.