The Environmental Permitting (England and Wales) Regulations 2007

SECTION 6.9Intensive Farming
Part A(1)

(a)Rearing poultry or pigs intensively in an installation with more than—

(i)40,000 places for poultry;

(ii)2,000 places for production pigs (over 30 kg); or

(iii)750 places for sows.