Irix lens repair

Has anyone had an Irix lens repaired?
The official service centre is in Poland and that is quite expensive and not straight forward now after Brexit.
I would prefer to find a UK repair technician.
The lens is the 15mm f2.4 Blackstone and use it on a K1. - I have also checked it on a K3.
The lens does not stop down to the right aperture causing overexposure.
If I shoot at full aperture then it is fine but at smaller apertures it is over- exposed.
It appears that the diaphram lever is not moving freely it is very slow to move and it does not spring back.
Also the lens mount is now loose.
I bought this lens new from Cameraworld and when I first had it I occasionally had the same overexposure problem but that seemed to resolve itself and the lens has been fine since then until a recent trip.
I contacted Cameraworld but they offered no help whatsoever.

I would be grateful for any suggestions.
Paul

Is the lens still under warranty? If so, Cameraworld are obliged to help.

If out of warranty, who are the importers? Maybe they could assist?

The lens is out of warranty unfortunately.
A good question as to who are the importers. A cannot find a reference to one. I am trying the few companies who advertise Irix lenses for sale.

Park cameras for one.

If it's out of warranty then I'd try and tighten up the lens mount before doing anything else.

It sounds like there's a bit of friction somewhere in there.

It appears that others have had what seems like similar problems. This (link) might or might not help. Good luck.

Steve

I realise that it is a long shot, but would it be worth contacting London Camera Exchange who do offer a repair service? From the problems that other people have had and solutions that they have come up with, it might be worth a punt!!!

Good Luck

Michael

Thank you for your replies.
I am pleased to report success.
I contacted Harrison Cameras as they advertise Irix lenses for sale. They sent it to a repair company they use.
I received it back this week, all fixed.
I can thoroughly recommend Harrison Cameras. They were so friendly , helpful and efficient.

Paul

Thanks, that's good to know. My Irix 150mm is still behaving itself, but it's a comforting thought that there are good people who could fix it if it did develop a problem.

Steve