Update:
Picked the car up from the dealers last week & they said they ran it through the diagnostic machines etc & did a roadtest of approx 10miles to test the steering but couldn't find any faults.
Anyway, as I was driving the car over to the dealers for it to be checked, the error light (typically) disappeared.
I explained this when booking it in & the guy said it probably just reset itself but I insisted that it was still looked at to put my mind at rest.
So there's nothing wrong with it at all, just one of these things but he did say to keep an eye on it.
