First early potatoes - are they ready?

The Digger went off to the allotment to see if the first early potato Rocket had produced anything yet. We had grown some in a large pot, started off in the greenhouse, and were quite pleased with the amount we got from just three tubers. They gave us a very welcome early crop. Now it was time to check the actual rows. You never know what you’re going to get - will the tubers be the size of marbles? Not this time. Blimey!