Very seldom in the UK does the ambient air temperature produce a windchill that is at Neutral Skin Temperature.
Even on a warm day when the ambient is in the twenties, windchill will use energy. Bare arms and legs will conduct away heat energy to the passing air. To combat windchill, keep covered.
If he had temperature monitoring equipment inside his undershirts yesterday, they’d read 33 Deg C. As we’ve seen, he’s not overheating.
In the summer, he’d be wise wearing white arm and leg warmers, to stop windchill and reflect the sun’s rays.