Rivage cabrio brake pedal not returning fully and making switch

Hi,
really struggling with an annoying issue which is making the Rivage (RHD 1991) unuseable.
Brake pedal is not returning all the way to the stop and depressing the brake light switch enough meaning the brake lights are on all the time unless I lift the pedal up with my toes under it after every brake application. Stop is adjustable obviously and I've no idea if pedal was hitting the stop previously or at any time

Switch is new and the self-adjusting type (pull the pin out clicks and the pedal clicks it back so it's set at the pedal rest position). If I adjust it out the pedal clicks it back in a couple of clicks and back to square one. Pedal depresses it but not enough to break the switch and turn the brake lights off.

The return spring behind the servo looks ok and appears to be against the stop when the pedal is not depressed (i.e. it can't physically 'return'; the mechanism any further) but the pedal is not on the stop and I can lift the pedal up half an inch to hit the stop and make the switch, turning off the brake lights. Interestingly if I pull the pedal up and then let it drop to it's current rest position the brake lights remain off (switch remains open) until next time the brake pedal is depressed and again it doesn't return to the stop and the switch is not depressed enough to turn the lights off unless I lift the pedal again.
 

Had to split the post into two because it was too long, this is why I hardly use forums..

There is a 'torsion spring' (11A in attached ETKA image) 
on the pedal but weirdly this is installed (as per the ETKA diagram) to push the pedal downwards and it is pretty weak. I don't really understand the function of this spring.

I have considered trying to adjust the clevis (18 in attached ETKA image) on the shaft to move the pedal out when at rest, unsure if this is wise or not, it must have the thread for a reason.
I've had the pedal in and out a few times now but none the wiser.
Video linked below (hopefully) to show the rest position of the pedal and how it can be lifted up (back) to the stop making the switch fully and turning off the brake lights.
20250406_141528.mp4
Any ideas would be gratefully received .

Thanks, Chris.

If yours is RHD, then wouldn't you need this blow out.



Check all your pivot points as one of the could be globbered up with dirt and debris.

Briano1234 said

If yours is RHD, then wouldn't you need this blow out.

Yes, in addition. The RHD diagram doesn't show the pivot for the pedal and, as described, mine has the torsion spring (11A) shown on the first diagram which (gently) pushes the pedal downwards.
I'm going to attack the pivot points in the engine bay, they are pretty grimed up. Would like to strip it all, clean and grease but horrible to get to and work on. See how brave I get.

Also as described, the return spring behind the servo is fully against the bracket stop with no pressure on pedal so the mechanism at that end is as far as it can/will return. Even if the pivot mechanism at the other end was gakked up, being able to pull the pedal upwards freely shows that it's not stiff/stuck.
Thanks, Chris.