Tom & Helen are brother & sister and run Bridge Farm, after their parents Pat & Tony recently retired. It's an organic farm, with a lot of veg, also some beef cattle, and until last year, a dairy farm. (They still have a dairy, where they make cheese and yoghurt, but now buy in the milk.) And Tom has pigs, too, though I can't remember if they're still organic.
Until recently, they had a shop in Borchester, called Ambridge Organics. They have closed that, but want to open a shop on the farm itself, selling the same sort of produce. They're going to be converting some/all of the packing shed for this (presumably they have other space for packing their veg boxes) - this has been used since the flood for the village shop, as the village shop premises were made unfit because of the flooding. Of course, the village shop may not be going back to the original shop premises, because of Hazel Woolley's dastardly plans to convert it all to luxury accommodation, but that's not actually anything to do with the Bridge Farm plans, whatever Susan Carter may be ranting about the subject.