Admittedly the most indoor physical exercise I've done in the past two days of this "heatwave" is carry four trays of food shopping delivery upstairs to our first floor flat and unpack them, but despite our lounge termometer reading27.3C currently, it's felt unusually comfortable with the pedestal fan on setting 1/2.
Maybe because we haven't opened the windows and loft hatch as normal when heatwaves come?
The low humidity reading for our lounge of 46%?
I've been invaded by the ghost of astbestos Robfosters?