Thanks for the advice Nick.
I went out yesterday and didn't have anything off the area, however, literally right under my rod tip I noticed some reeds twitching so managed to sneak my bait in there and had one, only 12lb but something! I thought I would test out the KD rig on an uncoated braid with a balanced artificial chop. Turns out it hooked the fish in the top of the mouth so I'm going to try just a normal hair rig today, ditch the fancy stuff!
I'm hoping this area will produce something bigger. One thing I notice is the crays get on the bait near enough as soon as I put the rig in. Do you think they would show themselves if the carp were in the swim?