Bridge Farm used to run their own dairy herd but gave it up. They now buy in milk for yoghurt, cheese, etc. Is the land ex-dairy, that is now being used by Tony for his hobby farming of beef cattle? Is that why he felt compelled to vote against his instincts - because it was his little retirement indulgence which could be better utilised as his DCs' capital-for-investment.
Tom and Helen run a different farm from Pat and Tony's day, with plans to make it even more different. They are heading into Lower Loxley / Spiritual Home territory with their conference/training/workshop angle.