Parking brake is a common issue on the Aeros as it is a different caliper/disc I am afraid. I would hesitate to say my local MoT garage allows a degree of latitude on some points (side pipes being one of them) however this might be one they have seen before.
Cabling behind the dash is very tight and so the tell tales will sometimes glow when the car is off among other things. Dropping the dash is a task for the brave (with really tiny fingers)
Parking Brake/windscreen washer ? How are these linked ? If it is just the windscreen washer then that is also common on the earlier cars as the pipes used to come apart and dribble the water into footwell, refill the bottle and look for wet carpets and around the bulkhead on the floor.
Yes it is a Morgan thing. We all get a little leaky in our older age apparently.
