Small Potatoes (Harvest)

The UK's traditional Christmas dinner features roast potatoes, along with the turkey, stuffing, parsnips and Brussel sprouts etc. Potatoes are, however, likely to be scarce this year. After an Autumn (Fall) of heavy rains, UK farmers have had one of their lowest potato harvests on record (https://www.theguardian.com/food/2023/dec/01/low-uk-potato-harvests-raise-fears-about-christmas-supplies). Its seems likely that the UK will have to import potatoes from as far away as Egypt. Although this might give the spud an increased festive feel (a la the Magi), costs will increase. Transport is also going to ramp up 'greenhouse gas' emissions even further. Can no other carbohydrate source be substituted?