Thanks for the feedback and apologies for the late reply. I've carefully checked the gasket and it is perfectly intact, no tears or compressed areas, looks like new. However upon closer examination, at either end of the plastic strip which runs along the length of the base of the rear window there are around 10 rectangular what I assume are drain holes? Behind these is a of debris which has dried out and appears to be caked to the plastic. Perhaps the rain is supposed ti drain through these channels and into the drain channel which runs along the inside length of the boot and is always bone dry?
Another quick question for this forum, two wet patches beneath the car which looks like no more than water (no small), assume A/C related to condensation, is that normal for a car of this type/age?
Thanks