The car was checked today and the front offside headlight assembly will be replaced in it's entirety.
The misting inside the hatch door rear lights is more of a problem.
They say that these units, being totally plastic need to be vented to avoid build up of heat. The vent therefore allows some moisture in but this is quickly dissipated when the lights are turned on.
They say that Fords are aware of this and have been for a number of years on all their cars.
I am not happy with that explanation and feel that if moisture gets into the housing then when it is allowed to stay there, possibly for many days, it will cause corrosion eventually.
I will be very grateful if owners could keep an eye on their rear lights, report any similar misting and what their local supplier will do about it.
In the meantime i will attempt to contact Ford direct.