References
- Conservation principles. Policies and guidance for the sustainable management of the historic environment, English Heritage, April 2008
- Guide to the principles of the conservation of historic buildings, The British Standards Institution 2013, BS7913:2013
- The Approved Document Part M (Access to and use of buildings) – Vol.2, NBS March 2015
- Design of buildings and their approaches to meet needs of disabled people, The British Standards Institution 2013, BS8300:2009+A1: 2010
- The Approved Document Part B2 (Fire Safety) – Vol.2, NBS January 2013
- Barriers in and about buildings – code of practice, The British Standards Institution 2011, BS6180:2011, section 6.2, p.8
- Safety signs, The British Standards Institution 2013, BS5499-4:2013, section 4.1, p.3