I forgot about these sqeeks/rattles Used to drive me spare. One was the panel below the steering wheel (nipped the screws/bolts - twice) The other one was the centre panel immediately below the dash - wedged a piece of card between the two and forgot about it. Pulled it out months later and the squeek had gone.
These really used to wind me up and I've forgotten totally about them until now!
I don't know if my actions curred the
problem but they have definately gone and hopefully will never resurface again. Could be that the cars mellowing out with old age - first MOT a few months back.