Regional member changes to the Senedd

This is a list of regional member changes (co-options) to the Senedd (Welsh Parliament; Welsh: Senedd Cymru; formerly the National Assembly of Wales before 2020). Under the provisions of the Government of Wales Act, 1998, regional members of the Senedd who resign, die or are otherwise disqualified are replaced by the next available and willing person of their original party's list, and no by-election occurs.^[1]

These are the co-options that have occurred since the first elections in 1999.

Assembly / Senedd term	Region	Date (that new member took the oath)	Incumbent	Party		Replacement	Party		Cause
1999–2003	Mid and West Wales	1 May 2000	Alun Michael[2]		Labour	Delyth Evans		Labour	Resignation to concentrate on his post as Member of Parliament
	North Wales	22 March 2001	Christine Humphreys[3]		Liberal Democrats	Eleanor Burnham		Liberal Democrats	Resignation on health grounds
	North Wales	10 Sept 2002	Rod Richards[4]		Conservative	David Jones		Conservative	Resignation on health grounds (Alcoholism)[4]
2007–2011	South Wales East	30 June 2010	Mike German[5]		Liberal Democrats	Veronica German		Liberal Democrats	Resignation on appointment to House of Lords
2011–2016	South Wales West	19 May 2015 [6]	Byron Davies[7]		Conservative	Altaf Hussain		Conservative	Resignation on 15 May 2015 due to election as MP for Gower
	North Wales	27 May 2015 [8]	Antoinette Sandbach[7]		Conservative	Janet Haworth		Conservative	Resignation on 8 May 2015 due to election as MP for Eddisbury
2016–2021	North Wales	28 Dec 2017	Nathan Gill[9]		UKIP	Mandy Jones		UKIP	Resignation on 27 December 2017 to concentrate on his post as Member of the European Parliament
	Mid and West Wales	2 August 2018[10]	Simon Thomas[11]		Plaid Cymru	Helen Mary Jones		Plaid Cymru	Resignation on 25 July 2018 due to arrest for possession of indecent images[11]
	South Wales East	8 February 2019 [12]	Steffan Lewis[13]		Plaid Cymru	Delyth Jewell		Plaid Cymru	Death from bowel cancer on 11 January 2019
	South Wales East	6 July 2020	Mohammad Asghar		Conservative	Laura Anne Jones		Conservative	Death on 16 June 2020

No co-options occurred during the Second Assembly (2003–2007).

See also

• List of by-elections to the Senedd
• List of Welsh AMs/MSs with the shortest service
• Regional member changes in the Scottish Parliament