In the run-up to Christmas this year, perhaps spare a thought or two for the growers who will put the veg on your Christmas dinner table.

There are only one or two vegetables that suffer from what you might call hyper-seasonality, that are really only eaten at one, very specific time of the year. Pumpkins are one, the vast majority consumed at Halloween. Brussels sprouts are the other, with most people eating them only on Christmas Day (and the rest avoiding them like the plague!).