Today at about 11am got into car and found all; windows clouded up ,. Usually I operate all windows up and down which normally clears them sufficient to drive off, but this time it was inside as well. Even the control panel was misted  up. The sun was out and next doors car which is in different position to mine was clear. The outside temp was  at 6.5.  This is the first time in memory of having this . we live in a area which is supposed to be the driest part of uk.

You may have a leak in the coolant system to the heater matrix, keep an eye out for damp patches in the footwell carpeting, strange smells and coolant reservoir level decreasing.