Apologies if this has been asked before but I can't find an answer anywhere - yesterday when I got in the car the quick access bar on the mmi had moved from the right hand side of the screen to the left and I can't find how to move it back - does anyone know how to do it please I'm pulling my hair out going through every menu trying to find it 

Interesting, I got in the car 17:45 on Sat and no call or destination history.  Drove the car for 30 mins, picked up a meal and when I got back in and started the car everything back to normal.

Only thing that was slightly odd was I didn't get the user prompt until after the engine had started. 

Has the quick access bar gone back to it's original location?

Yup - about the same time on Saturday- think it must have been an over the air update gone wrong and then corrected.

Any luck with this as my quick access toolbar has moved from the right hand side to the left and I cannot move it back 

Yes - push the volume rotary knob down and hold it down for about 15 to 20 seconds - system will reboot and quick access bar should go back to the right - it worked for me - good luck