under braking (does not have to be heavy) i am sometimes getting a high pitch squealing, i have checked the pads and all are ok as far as i can see without getting the wheels off etc.
any ideas what it will be??

also any one know af a good paint shop and lexus specilist in the north west area?

check to see if the pads are glazed, but the first thing i would try is to remove the pads and apply a thin layer of copper grease to the shims and back of pads. refit them propperly making sure you dont get any on the discs or braking pad surface.

This should cure most squeals associated with discs.

If it still persists check for pad glazing (looks shiny) and warped discs.

Good luck

Mine do that as well and I believe it's an excess of brake dust building up