The Regulatory Reform Order (RRO) 2005 or Fire Safety Order states that the 'responsible person(s)' of any buildings open to the public need to ensure that all fire safety equipment is fit for purpose (including fire doors) and face very severe prosecutions if found guilty of having fire safety equipment that is faulty or poorly maintained, this includes fire doors. The responsible person can only be sure of the compliance of their fire doors if they employ a fire door inspector (competent person) to assess them professionally.
Fire door inspections carried out by a certified fire door inspector.
An integral part of a fire risk assessment should discuss the need for fire doors. It is a legal requirement to have your fire doors inspected and maintained so that they remain fit for purpose.
The RRO (Fire Safety Order) states that there has to be 'a suitable maintenance regime to ensure relevant equipment is kept in an efficient state', this includes fire doors. According to the RRO is the responsible person's duty to maintain fire doors, you can face very severe prosecutions if found guilty of having fire doors that are not fit for purpose.