Building Regulations and Window Energy Ratings
The process for applying for a Window Energy Rating
3) Registering your WER
The certifying body such as the BFRC or CERTASS will register your rating and issue a WER label. An official list will be publicly available. You require a minimum of a ‘C’ rating as of October 2010.
Please compare the licencing rules from each certifying body and choose the WER licence most suited to your requirements.
Building Regulations and WERs Page 17