If interested, there is a free p&p weekend at DT BROWN SEEDS when you shop online - you'll need to enter the code D17BFRD at the checkout
I know it seems too early to be shopping for seed potatoes or onion sets for planting next year, but sometimes its worth taking advantage of free p&p if there's something particular you want to get. The seed potatoes / onion sets / asparagus crowns etc, are despatched later after the new year if for spring planting.
If you want to wait until spring and prefer to shop at your local garden centre, that's fine