Great feedback folks, ta.
I am well supplied with summer shorts but have been unable to find leg & arm warmers that don't either slip or have stitching in places that chafe (eg behind the knee). If such beasts exist then they would be a satisfactory solution.
I've tried trackies over shorts, but find them disconcertingly 'slidey' as the outer layer and inner layer do not act as one.
Padded summer tights that weren't too spendy did exist a few years ago so I wonder if their apparent absence is a symptom of the plague.