Yup, as barcodes weren't in general use in Britain before the early/mid '80s I wondered if the magazine was a humorous mock-up using a current cover. Looked hard for the joke in fact, as I remember most of the people mentioned.
When I were a lass the vegetable-water was saved after cooking and we'd be given it to drink. Delicious and a great treat if it was still warm. My favourite was carrot-water but all varieties were welcome. It was believed to have health-giving qualities.
I cook vegetables most days in the steamer, which keeps the nutrients in the food instead of the water. Yes, I still drink it. No, steamer vegetable-water is nothing LIKE as tasty as the old stuff!