The government accepts this recommendation. We will work with the professional and academic community to address this recommendation through the ongoing Approved Document B review led by the Building Safety Regulator which will consider any necessary changes to the guidance for external walls. Research in this area will inform any future evolution of changes to or introduction of new testing methods. The government will look to the construction sector to demonstrate that the test methods used are effective and give a genuine indication of the likely behaviour of an external wall system in the event of a fire.