Loose Locker lock barrels on Inca EL

How can I tighten the lock barrels which spin or come out completely. Can i replace them. If so, how do I tighten them in place?

The barrels have flat sides so they can't turn in the hole. This suggests that the holes in the locker door have been 'rounded'. If you can take one out and post pictures of it and the hole, we may be able to offer some advice. For example you may be able to cut the correct profile in a piece of plastic and glue it inside the locker.

Many thanks. I will inspect thethe profile of the hole.

Hi
   I hope you still have the lock barrels as they can fall out ,The same happened on my Surrey .AS keep the outers so it may be an easy job
Regards
Alan

Our last van started to part company with the lock barrels, gave a good oiling with 3in1 oil and worked the key up and down before replacing the barrel in the housing But ensure the flats that Peter mentioned line up in the housing. Best of luck but it did work for me