Automatic doors are not a legal requirement per se, but may fall under the "reasonable adjustments," madated by the Equality Act (2010). This is the major piece of UK legislation that sets out the requirements for equal access to services, businesses and premises. New buildings are covered by building regulations: you can read more in Approved Document M. Regardless of whether you are legally required to install automatic doors, you may find that the improved customer access to the building is worth the investment.