Part B: Fire Safety
The building shall be designed and constructed so that there are appropriate provisions for the early warning of fire and appropriate means of escape in case of fire from the building to a place of safety outside the building capable of being safely and effectively used at all material times http://www.simplifydiy.com/building-regulations/part-b
Fire Doors
If fire breaks out it can quickly spread through a building if it is unhindered http://www.simplifydiy.com/windows-and-doors/doors/fire-doors
Radiators
Whatever style you choose radiators all essentially work by heating the air that surrounds them via radiation andor convection http://www.simplifydiy.com/plumbing-and-heating/radiators