Chicken Mega-Farms for the UK?

It is said that the average person in the UK eats chicken twice a week. The poultry industry has claimed that, to continue this, will require the setting up of more chicken mega-farms where thousand of birds are housed under cover (https://www.theguardian.com/environment/2018/jul/03/intensive-chicken-mega-farms-feed-uk-poultry-industry-head-richard-griffiths). This is in spite of a mark-up price for 'free-range' chicken produce (the producers argue that consumers will have the choice). Unfortunately, mega-farms may well prove to be inescapable post-Brexit if the UK gets a 'great deal' with the US that forces us to take chlorinated chicken (genuinely, a 'race to the bottom').