1. Acts of Parliament. 1999. Greater London Authority Act. http://www.legislation.gov.uk/ukpga/1999/29/pdfs/ukpga_19990029_en.pdf [Accessed: 26 August 2020].
2. Acts of Parliament. 2000. Transport Act 2000. Chapter 38, Part III, Chapter I. http://www.legislation.gov.uk/ukpga/2000/38/part/III [Accessed: 26 August 2020].
3. Acts of Parliament. 2008. Local Transport Act 2008. https://www.legislation.gov.uk/ukpga/2008/26/contents [Accessed: 2 July 2021].
4. Acts of the Scottish Parliament. 2001. Transport (Scotland) Act 2001. Part 3. http://www.legislation.gov.uk/asp/2001/2/pdfs/asp_20010002_en.pdf [Accessed: 26 August 2020].
5. Acts of the Scottish Parliament. 2019. Transport (Scotland) Act 2019. https://www.legislation.gov.uk/asp/2019/17/contents/enacted [Accessed: 26 August 2020].