The Building Regulations 2000.
Stationery Office (Great Britain)
[London] : TSO,
c2006-
Cover title.
L1A. Conservation of fuel and power in new buildings -- L1B.  Conservation of fuel and power in existing dwellings -- L2A. Conservation of fuel and power in new buildings other than dwellings -- L2B. Conservation of fuel and power in existing buildings other than dwellings