I suggest you read about the proposals, Grey and Aldaniti, then put forward properly based objections to the plans with supporting evidence as to why it's 'battery farming' and where the environmental dangers are not properly managed.
First off, they reduced the application from 8100 cows, to some 3600. They were/are also building anaerobic biodigesters to complement the slurry output, creating energy. The regulations surrounding the proposal and the health, safety and welfare issues were absolutely rigorous and the reason they've pulled out is because the money they have already had to invest has been tremendous and the last hurdle put the kibosh on it.
See here
http://www.fwi.co.uk/Articles/2011/02/16/125538/VIDEO-Nocton-withdraws-plans-for-super-dairy.htm
I can understand your concerns but the days of small UK dairy farms are disappearing fast. There were six in my area when I came here 11 years ago, now there are two. If we continue to bar applications like this, then rest assured the dairy products we will all be consuming will not be UK produced but will be imported and you have absolutely no idea about animal welfare issues in other countries, let alone any control over them. You can spout off as much as you like about supermarkets need to pay more, we all need to pay more but it simply isn't going to happen unless government steps back in and we go back to the days of the Milk Marketing Board when there was control over farm gate prices. We've all become used to cheap food and the supermarkets are not voluntarily going to lose one of their most profitable lines.
Having seen large dairies in operation now and also knowing how ridiculously hard small dairy farmers operating with 80 - 150 cows have to work and how each year, reinvestment into buildings and machinery becomes less and less manageable, then operations like Nocton, based here in the UK where they will be rigorously managed and where animal welfare will have to be the highest priority of all, personally it's the lesser of two evils because small dairy farms are disappearing so fast.
If a cow has a decent bed, proper space to exercise herself and good forage and hard grub, then she couldn't care less whether she's inside or out! Although as I understand the plans, there were outside loafing areas too.