In June 2022 the Government issued an update to the Building (Amendment) 2022 Regulations and changes have been made to Approved Document B relating to external walls, which will come into force on 1st December 2022.
To say that these changes add complexity to the understanding of the regulations and guidance is an understatement.
In an attempt to simplify the changes Tetraclad have produced a graphic illustration: Reg 7 and AD B December 2022. This is not intended to be comprehensive but provides you with some brief pointers to aid understanding.