Vitesse driver's door lock barrel

[PMVit]

The lock barrel on my car has become very loose, enough so that it will turn when the car is moving and then requires fiddling to get it in the right position to allow the catch to work. Has anyone had a similar experience and can advise whether this is a problem to be fixed by repair or replacement (replacement barrels are available from Rimmer Bros, although apparently they require minor adjustment to enable fitting). Also, can anyone advise on the process of getting at the barrel - does the whole lock mechanism have to be removed or just the external handle?  

[Chris A]

If you mean that the whole of the part you push to open the door from the outside, then it sounds like the problem I had with the passenger door. I solved it by removing the door card and tightening up again the mechanism that retains the push button. Easy job no cost.

[PMVit]

Thanks, Chris, at first pass that seems to have worked 👍