PS3 Not reading disks now?

Good morning,

I have a PS3 and it has worked faultlessly until yesterday. It seems now not to read disks. Everything else works fine. But when I insert a disc, I normally go to the menu select it and it plays. It no no longer shows on the menue so I cannot play it or even locate it. All other operations work normally.

To help I have noticed that over time it was taking longer and longer to read the disk before it would play?

Can you advise on a fix for me or a repair pleas. I live in Crawley Sussex.