Solution confirmed:ABS & VDC System failures
My GT has suffered with these errors for about a year; must admit it was a lot of fun to do some high speed mountain passes & cornering without electronic assistance, but finally the continous beeping and error display just got too much.
Having searched the forum a while ago, I concluded that it was the brake switch. Dealer diagnostics agreed and switch part number 46840510 at a cost in your currency of approx GBP 14 was fitted ................... this was two weeks ago and all seems 100%.
Just a word of warning - whilst many have reported the above error also causing a number plate light error, mine was an actual number plate light problem. Fitted two new bulbs ( although the old ones were working?), "tightened" the terminals in the bulbholders and cleaned with contact spray.