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Billington, Michael (19 January 2007). "There Came a Gypsy Riding". The Guardian. Archived from the original on 20 March 2021. Retrieved 20 March 2021.
Billington, Michael (2 February 2009). "Entertaining Mr Sloane". The Guardian. Archived from the original on 23 September 2020. Retrieved 20 March 2021.
Billington, Michael (13 May 2011). "A Delicate Balance – review". The Guardian. Archived from the original on 2 August 2020. Retrieved 20 March 2021.
Billington, Michael (21 March 2012). "Sweeney Todd - review". The Guardian. Archived from the original on 17 October 2018. Retrieved 20 March 2021.
"New Year Honours List"(PDF). The London Gazette (61450). United Kingdom: The Stationery Office: N10. 30 December 2015. Archived(PDF) from the original on 18 September 2020. Retrieved 9 April 2021.
"New Year Honours"(PDF). The London Gazette (57855). United Kingdom: The Stationery Office: N12. 30 December 2005. Archived(PDF) from the original on 4 June 2019. Retrieved 9 April 2021.