Disc not reading

It is very common for the laser to fail on the PS3. Cleaning the laser rarely solves the problem. There was a batch of faulty lasers fitted on PS3 so there are lots failing. There are plenty of places to get a new laser fitted. The experts in Manchester are:
http://www.playbackups.com/laser-replacement-PS3-modchip-repairs-oldham-manchester.html
They do pickup and delivery throughout the UK.

If you're getting a Disc Read Error (DRE), it could be one or both of these things.

Your laser lens is dirty or broken and needs to be cleaned or replaced, or your disc tray is faulty and needs to be serviced.

Try cleaning the lens and see if it will read. If you can hear the disc spin in the PS3, then your disc tray is fine.