Question: What ensign, used by Parliment during the Fifties, Sixties, and Seventies in Northern Ireland, was also used to represent Northern Ireland at the 2010 Commonwealth Games?

Context articles: Irish Boundary Commission
Ulster Banner
Wendy Houvenaghel
Justine McEleney
Lydia Boylan
Northern Ireland at the 2010 Commonwealth Games
Northern Ireland national netball team
Jason Smyth
Carl Magnay
Flag of Northern Ireland

The Irish Boundary Commission (Irish: "Coimisiún na Teorainne" ) met in 1924–25 to decide on the precise delineation of the border between the Irish Free State and Northern Ireland.
 The 1921 Anglo-Irish Treaty, which ended the War of Independence, provided for such a commission if Northern Ireland chose to secede from the Irish Free State, an event that occurred as expected two days after the Free State's inception on 6 December 1922.
 The governments of the United Kingdom, of the Irish Free State and of Northern Ireland were to nominate one member each to the commission.
 When the Northern government refused to cooperate, the British government assigned a Belfast newspaper editor to represent Northern Irish interests.
The Ulster Banner (Ulster-Scots: "Ulstèr Bannèr"; Irish: "Meirge Uladh" ) is a heraldic banner taken from the former coat of arms of Northern Ireland, consisting of a red cross on a white field, upon which is a crowned six-pointed star with a red hand in the centre.
 It was the flag of the former Government of Northern Ireland and common flag of Northern Ireland from 1953 until that government was abolished in 1972.
 It was adopted to mark the coronation of Queen Elizabeth II, and was first flown over Parliament Buildings on 1 July 1953, in honour of the Queen's visit.
 The Minister of Home Affairs announced that, while the Union Jack was the only standard officially recognised, those who wished to have a distinctive Ulster symbol might use the banner.
 Since 1972, the Ulster Banner has had no official status and is not used by the current Northern Ireland government or by the British government.
 However, the Ulster Banner is still in common use by loyalists/unionists, and to represent Northern Ireland internationally in some sporting competitions.
 It has become a symbol of Ulster loyalism and is a contentious symbol.
 In recent years there have been calls for a new, neutral flag for Northern Ireland to replace the Ulster Banner.
Wendy Louise Houvenaghel (née McLean; born 27 November 1974) is a Northern Irish former racing cyclist from Upperlands, County Londonderry, Northern Ireland, riding on both the road and track, but specialising in the latter.
 She has represented Great Britain in various World Cycling Championships and in the 2008 Olympic Games, most notably winning the silver medal at the Beijing Olympic Games, and gold in the team pursuit at the 2008, 2009 and 2011 Track World Championships.
 She has also won many British national titles and represented England at the 2006 Commonwealth Games and Northern Ireland at the 2010 Commonwealth Games.
 Houvenaghel is based in Cornwall, England.
Justine McEleney (born 15 May 1994) is a British beauty pageant titleholder who was crowned as Miss Earth Northern Ireland 2014 that gives her the right to represent Northern Ireland at Miss Earth 2014 in November.
 She was crowned by Miss Earth Northern Ireland 2013, Amira Graham.
Lydia Boylan (born 19 July 1987) is an Irish professional racing cyclist.
 She is originally from Dublin.
 She competed for Northern Ireland at the 2014 Commonwealth Games in Glasgow, where she finished 21st in the women's road race 14th in the scratch race and 16th in the points race.
 She is eligible to represent Northern Ireland through her mother.
 She rode at the 2015 UCI Track Cycling World Championships.
 Boylan won the Irish National Road Race Championships in 2015 and 2016.
 Outside of cycling she is a qualified engineer, graduating with a bachelor's degree in Civil Engineering from University College Dublin in 2008 and a master's degree in Earthquake Engineering from Imperial College London in 2010.
 Since November 2013 she has combined her cycling career with teaching at the University of Nottingham's School of Architecture.
Northern Ireland was represented at the 2010 Commonwealth Games by the Commonwealth Games Council for Northern Ireland.
 The team went by the abbreviation "NIR" and used the Ulster Banner as its flag and Londonderry Air as the victory anthem.
The Northern Ireland national netball team represent Northern Ireland in international netball.
 The Northern Ireland team are presently coached by former representative captain Elaine Rice.
 During Rice's time as head coach, Northern Ireland have won the 2009 Nations Cup in Singapore, and came third in the 2011 European Netball Championships in Antrim.
 The team qualified for the 2011 World Netball Championships in Singapore, where they progressed to their first ever finals stage, eventually finishing 8th.
 As of 23rd October 2016, Northern Ireland are ranked 11th on the INF World Rankings.
Jason Smyth (born 4 July 1987) is an Irish sprint runner.
 He competes in the T13 disability sport classification as he is legally blind, with his central vision being affected by Stargardt's disease; he also competes in elite non-Paralympic competition.
 s of July 2014 , Smyth holds T13 World records in the 100m and 200m events.
 He was selected to represent Northern Ireland at the 2014 Commonwealth Games.
 Deterioration in his vision meant that he was reassigned to the T12 classification in 2014, but he was subsequently reclassified back to T13 in 2015.
Carl Ronald Joseph Magnay (born 20 January 1989) is a professional footballer who plays as a defender for League Two club Hartlepool United.
 Due to having Northern Irish grandparents, English-born Magnay is eligible to represent Northern Ireland or the Republic of Ireland.
 He made his international debut the Northern Ireland U-21 team on Tuesday 11 August 2009, in an away friendly against Portugal's U-21 team.
The official flag of Northern Ireland is the Union Flag of the United Kingdom.
 From 1953 until 1973, the Ulster Banner (also known as the Ulster flag) was used by the Parliament of Northern Ireland; however, since its abolition use of the flag has been limited to representing Northern Ireland in certain sports, at the Commonwealth of Nations, at some local councils and at some other organisations and occasions.
 Despite this, the Ulster Banner is still commonly seen and referred to as the flag of Northern Ireland, especially by those from the unionist and loyalist communities.