Help - T.V play, farmer with cows called Gert, ফ্ুলপাছ loses farm, does anyone know the name of play please?

Please can any of your অনুরাগী tell me the name of a play which I rate as the best thing I have ever seen him in. He played the part of an old farmer in Wales who was persuaded দ্বারা his sons and their computer মডেল সমাহার to vastly increase his dairy herd of cows and to borrow heavily to do so. Soon after, the EU imposed দুধ quotas, he locks the inspector in the muddy isolated বাছুর shed and then loses everything - the farm having been in the family for generations. It ends with him alone in either a mental institution অথবা prison with him saying "come on in, Gert, ফ্ুলপাছ etc," (the names of the cows) which was so poignent as that was how the play started, but him in the field calling the cows in. I have searched for hours on the net, please help. Also does anyone know if it is available anywhere to purchase. Thanks very much.