Mystery veg

So, with some help from Field Day readers, we seem to have narrowed the mystery veg down to one of three things:

Nick reckons it's a variety of radish called a 'French Breakfast'. G Tull reckons it's a China Rose winter radish. Owd Fred reckons it's a mangel wurzel.

Meanwhile, I've given it back to the guy who brought it to me and he's taken it home. He's wary of eating it until he's 100% sure what it is, though...