Well after removing the glove box and having a snout about it turns out that on the non climatronic models the re-circ flap for the interior is not present nor the motor.
This means in re-circ it is louder in the cabin plus exposed a little if anything falls through the back of the glove box. Mainly the slot where the handbook goes.
So I see the fan and half is missing, I remove the cabin filter and a broken biro falls out along with half the main fan blades.....!!!
So it's obvious now what the noise and cause was.
Pics below.....!!!!
Fan is £102+vat .....! Can't buy separate from motor. :-(