I omitted to lift the balance of the beetroot prior to flitting off on holiday. Clearly there cannot have been any severe frosts in my absence. The leaves are still untouched by winter's cold hand and the, "beets," are unscathed. I pulled a few of the beetroot to roast for tonight's munchies and I can now report, having consumed the said vegetables, that they provided a very acceptable accompaniment to the evening repast.
There are frosts forecast for the end of this week so I must remember to harvest the remaining beetroot and store them in sand filled boxes tomorrow or Wednesday.