The salesman demonstrated the traction control and power modes to me at my house when he delivered the bike.
The dealer has not been the best at keeping me informed on progress so I contacted Kawasaki UK directly to apply pressure on the dealer. I was informed by Kawasaki that my bike has a history of repairs (Actuator replaced November 2011, Air switch valve and valve assembly replaced January 2012). Just to recap, the bike was first registered in September 2011.
Kawasaki informed me that the dealer had submitted the diagnostics to Kawasaki and they haven't been able to pin point the problem, so Kawasaki has subsequently sent the dealer further checks and tests to perform.
The dealer then informed me that they are replacing the throttle bodies (complete assembly), and also the throttle position sensor and have been instructed to check and test the wiring loom.
So all in, this is the third time the bike has been in for 'electronic' repairs, hence the reason I have become quite nervous.
I've tried to keep this as fair as possible without slating people and bringing names into disrepute. I had hoped someone else may have experienced a similar problem and had a solution.
Top marks though to Kawasaki for responding so quickly and putting the customer first (even with a used bike).
P.S. For the 30 miles that I did ride the bike, it was an absolute dream, handled very well and the brakes were absolutely phenomenal.