Finally repaired the air con as per your note Billofdurham & thank you for your help. Was a bit fiddly especially getting upper screw as it is behind the passenger glove box. Took the maverick approach & removed glove box & still hard to access, so drilled hole in position through panel ...

I was driving my car with air flow on low. All of a sudden, the air stopped then came back on at full flow & is now on permanently on. I can rotate the dial to air con on or off, but it stays at full blast. I can control the temperature, unfortunately not the flow as I have lost the ability to c...