I’ve seen a few patches of winter osr flowering again at the moment ! i mean full yellow, like secondary shoots, you would think it spring rape in the winter if you didn’t know it wasn‘t , god know when you desiccate or harvest a crop like that ?
The field in my picture above had a small patch still flowering. 95% of the rest of the field is nearly beyond glyphosate so it all got desiccated. 1 acre in 67 is not worth jeopardising the rest of the field for.