It was Kenneth Widmerpool's overcoat, readers of Powell will recall, that condemned him to the stigma of difference that followed him from his schooldays. If only his parents had purchased the standard specified overcoat from the school's tailors and outfitters ...
Michael Foot's supporters still aver to this day that what he wore to the Cenotaph on that single excruciating outing was an expensive green loden coat, and not a duffle-coat at all. Still, it's the image of Foot in a different overcoat that sticks in the British mind; these occasions demand uniformity, demand a single-breasted wool or mohair overcoat in black or Navy of conventional length and cut. All of which offers speculation as to Jeremy Corbyn's wardrobe. Surely he wouldn't dare pitch up in a peacoat and what my chum insists on calling his dutch cap?
This is the least of the many unknowns that will follow a Corbyn victory. An ineffective opposition will allow Osborne unfettered reign, goes the argument. Ah, runs the counter argument, that will provoke a swing back to Corbyn in 2020 as we Brits can't stand one-sidedness. Corbyn's honesty and openess at the dispatch box will make Cameron look like a hooray-henry twerp, we're told. Or his terrorist links will sink him - even now the Met Commisioner is being asked to arrest him, say others.
Personally, I'm going to avoid predictions altogether - I think we're so far into far-odds territory that no predictions are, er, at all predictable. But the Cenotaph will be a good test.