What the Highway Code says
The CdS does not make any mention of it and the need to wear particular clothing or not is not expressed; the only recommendation is that the driver has full freedom of movement. In short, all clear! Comfort first of all and how is it possible to be uncomfortable with a shirtless torso?Art. 169 paragraph 1: In all vehicles the driver must have the greatest freedom of movement to carry out the maneuvers necessary for driving.
The risks of bare-chested driving
What happens when you get out of the car? While for women the speech is clear, for men it is not a real administrative offense unless it is specifically indicated as in an ordinance of the Veneto municipality of Cadoneghe which, a few years ago, had prohibited motor activity in shirtless in public areas or for public use. Here too, as in the case of slippers, the advice is simple: no matter how annoying it is, always keep a light garment at hand to wear while driving so as to avoid any abrasions caused by the seat belt.