Green Lego baseplate at Milton Keynes Tesco (Kingston). It's with the Lego toys on an end. Plenty there.
Mrsandmum said it's national, so your local store may have some left.
What are Clubcard Prices?
Tesco rewards its Clubcard members with exclusive deals in-store and online. To get Clubcard Prices, scan your Clubcard app or tap your Clubcard/key fob at the checkout. If you're shopping online, you'll have a Clubcard number on your account already, so you get Clubcard Prices automatically. More info from Tesco