Shorts / trainers , bloody hell what cowboy mob do you drive for rob , and where do you go , most of the places I go won’t entertain safety shoes ( must be boots ) never mind trainers ( even safety ones) , and as for shorts , it has to be high viz trousers , not just trousers 
As for screw fix , not has trainers obviously but got my last pair of boots from them and there spot on , comfy and there lasting , wheras previous company / Dunlop ones were wore out in no time at all , shorts , deary me 