Mr. Richard Butler:

The requirements in the technical guidance documents are for non-complex buildings. When other buildings are being built compliance can be demonstrated by meeting the requirements in parts B1 to B5 in technical guidance document B. In other words, people must be able to get out of the building safely, there must be separation of fire between buildings, access for the fire brigade, surface lining and so on. They can comply so a competent designer would be needed. They may have to use passive systems like a higher grade of fire detection and sprinklers in the building.