There is currently a person knocking on doors in Boston giving scare-mongering information about home insulation and Energy Performance Certificates.
In simple terms EPC's are an indication of how well a home is insulated and range from A (efficient) to G (not very efficient). With a few exceptions, anyone selling or renting a house is required to have this EPC.
The guy I have complained about is making the false statement that you will not be able to sell your home after 2016-17 unless you have an EPC of level D or above, presumably to try to scare people into upgrading their insulation.