Suggestions For Permanent Veg On Clay-Type Soil?

Just started to clear/turn over soil on the largest section of our ne allotment, it's about 20 x 40 ft, don't quote me though certainly the biggest. Was wondering if it may be good to have a part for permanent veg, so would very much welcome any advice on most suitable permanent veg for a clay-type soil. common in these parts of Sussex. The plot is open to the sun, no trees or shade.

Even a permanent bed will need replenishing and help. From someone who has clay which would make bricks if left to itself, I would say that first you work with the soil and then set up a permanent bed.

If you can find and transport manure, use it. If you can find and transport straw, use it. Make as much compost as you can (make friends and beg stuff, remember that plain cardboard, clothes entirely of cotton or wool and scrunched up newspaper that isn't glossy are all good additions). Collect leaves and make leaf mould. Remember that pigeon droppings are good if you have anyone locally who races pigeons and that you can compost the bedding of vegetarian pets - rabbits, hamsters and similar.

Work on the area you want to make as a permanent bed with the products of your labours.

As Jonie says, beans and peas and roots do well. So do cabbages, sprouts, kale, broccoli and cauliflowers if you add lime to make sure that the soil is neutral.  So you have the option to grow stuff anyway whilst you do the soil thing.