I had massive problems with my Bank previously because of duff information held by them and 1 credit agency relating to my electoral register position and houses owned. So to my point, it does not mean bugger all, it has an impact.
Wrong. It's not your score that has an impact, it's the information which Experian (or whichever agency) use to make up that score.
Every lender will use a different calculation on that information to make up their own "score", based on the criteria which that particular lender feel is important.
So using the exact same information as in your Experian credit report, lender A may give you a "score" of 2/10, while lender B gives you a "score" of 9/10.
It doesn't matter what "score" Experian give you, because they aren't the ones deciding whether to lend you money.
Obviously if the information in your credit report is incorrect, it will affect your score, but it depends on the lender as to how.