So here we are, 6 whole days later and the removal of my old SD card seems to have done the trick. I'd also disabled Google Now as here in the UK there seems to be very little benefit (unless I'm missing the point) Google Now has been mentioned in a few posts as being the culprit so I'm not sure if that is the case in my instance.
I moved all of my apps and everything else onto my internal storage and found that the external card was redundant.
I only really have an SD card due to the habits I formed from having an HTC desire and running out of memory every two days (Remember those days lol ).
I'd not noticed but due to using cloud services, I no longer need to keep photos and films, even music stored locally. I always have an internet connection, be it Wi-fi or Network and as such I don't need hardly any of my local storage.
Of the 16GB that the phone comes with, I have just under 8 free.... Why the hell do I need a further 16 as an external storage capacity.
I've come to the conclusion, that people who complain about a device NOT having an SD card slot are missing the point. I was one of those people. Wake up guys, you don't need them
(Unless you are a drug dealer or general bad guy from out of a film and you are STILL suspicious of cloud computing. Maybe if you are a secret agent and Nathan Hunt/James Bond is your boss, you might want to avoid cloud storage too
)
Anyways, backl on topic. The removal of my unnecessary SD card and the disabling of Google Now seems to have freed up my note GT-N7000 again. It now runs JB without the lag.