These Regulations come into force on 31 July 2014 and apply to Wales only.
However, they do not apply to excepted energy buildings in Wales.
They amend the Building Regulations SI 2010/2214 by:

extending the energy efficiency requirements to a conservatory or porch in which a fixed heating appliance has been provided;
enabling the…

Details on this legislative text is provided by Cedrec. Please click here to see the summary.