white rock is horden m8 ,clean beach fishing down by deneholm turn left on beach and its roughly about 150yds along you will just be able to spot a small whitish rock bottom of bank.you have to look hard to spot it but imho fishing is all the same that area mainly yting and flats you need real good conditions for cod there.
north end of horden beach is better deeper water and mixed ground.
never fished blackhall but looks realy fishy to me