The saga continues...
checked door membranes front and rear - no prolems, doors dry too - all drains clear
checked drains in sills - all clear
removed rear seat and lifted rear carpet - felt underlay/sound deadening sodden
no signs of anything untoward. used hosepipe all over car whilst watching for leaks in rear footwell. when sprayign water under drivers footwell, eventually got a small leak from under the bitumastic bonded sound deadening in the rear footwell.
Removed front seat, front carpet, sound deadenign etc to find it sodden and stinking
took all weekend to dry the sound deadening out
Discovered a very small hole in the front floorpan at the edge of one of the rubber bungs - repaired this with some glass fibre and then applied underseal inside and out. checked all other bungs and reapplied underseal to these inside and out, bar two in the rear floor pan where they are beneath the bitumastic (bonded sound deadened plate) where i could only apply on the exterior. I couldn't see any reason for the water coming in under the bitumastic tho
Pleased as punch til i drove out last night in torrential rain - wet carpets again
Wet front and rear - as the two footwells are divided by a box section cross member i'm of the opinion the leak is still in the front half somewhere
I thought about a break/ blockage in the windscreen / scuttle area - anyone know whether there is a drain pipe and where this exits, and if this was blocked would it fill sufficiently to then leak into the cabin
I'm pretty sure now that whatever the leak is, its happening whilst stationary and whilst moving.
In answer to the other suggestions.... aerial is on front wing passenger side, rear ligth clusters are dry, as is whole of boot inclusing spare wheel well, and under rear seat base its dryzabone