Before revision: Rail replacement bus services have been used to operate parliamentary train services.
After revision: A report published in 2018 identified successful, and surviving, examples of this policy as the present X1 route operated by First Eastern Counties between Norwich and Peterborough,<ref><ref> and the BrightonHove Regency Route between Brighton and Tunbridge Wells, which partly replaces a route closed by Beeching.<ref><ref>Rail replacement bus services have been used to operate parliamentary train services.