Energy performance in buildings is regulated under the Energy Performance of Buildings (England and Wales) Regulations 2012, SI 2012/3118 (EPC Regs 2012) and the Building Regulations 2010, SI 2010/2214 (Building Regs 2010), which implement the requirements of the recast Energy Performance of Buildings Directive 2010/31/EU (recast EPBD directive). An energy performance certificate (EPC) is required when an existing building is sold or rented out (EPC Regs 2012, SI 2012/3118, reg 6). The seller or the prospective landlord must make an EPC available to 'a prospective buyer or tenant' free of charge at the earliest opportunity. This can be provided electronically, where the prospective buyer or tenant consents to this (EPC Regs 2012, SI 2012/3118, regs 6, 13). A person becomes a prospective buyer or tenant in relation to a building