Question: Tothill Fields was an 18th-century area of Westminster in the county of Middlesex, a historic county in south-east region of which country?

Context articles: Tothill Fields Bridewell
County Wexford
South Tipperary
Flag of Middlesex
Middlesex
South-East Region, Ireland
Middlesex Rugby Football Union
Tothill Fields
County Kilkenny
County Waterford

Tothill Fields Bridewell (also known as Tothill Fields Prison and Westminster Bridewell) was a prison located in the Westminster area of central London between 1618 and 1884.
 It was named 'Bridewell' after the Bridewell Palace, which during the 16th century had become one of the City of London's most important prisons.
 Tothill Fields later became the Westminster House of Correction.
County Wexford (Irish: "Contae Loch Garman" , Yola: Weiseforthe) is a county in Ireland.
 It is in the province of Leinster and is part of the South-East Region.
 It is named after the town of Wexford and was based on the historic Gaelic territory of Hy Kinsella ("Uí Ceinnsealaigh"), whose capital was Ferns.
 Wexford County Council is the local authority for the county.
 The population of the county is 145,273 according to the 2011 census.
South Tipperary (Irish: "Tiobraid Árann Theas" ) is a former county in Ireland.
 It is part of the South-East Region and is also located in the province of Munster.
 It was named after the town of Tipperary and consisted of 52% of the land area of the traditional county of Tipperary.
 South Tipperary County Council was the local authority for the county.
 The population of the county was 88,433 according to the 2011 census.
 It was abolished on 3 June 2014, merged with North Tipperary under a new Tipperary County Council.
The flag of Middlesex is the flag of the English county of Middlesex.
 It is the traditional flag of Middlesex, the historic county that forms the heart of London.
 This traditional design is included in the Flag Institute's registry of local flags as the Middlesex Flag.
Middlesex ( , abbreviation: Middx) is a historic county in south-east England.
 It is now entirely within the wider urbanised area of London.
 Its area is now also mostly within the ceremonial county of Greater London, with small sections in other neighbouring ceremonial counties.
 It was established in the Anglo-Saxon system from the territory of the Middle Saxons, and existed as an official unit until 1965.
 The historic county includes land stretching north of the River Thames from 3 mi east to 17 mi west of the City of London with the rivers Colne and Lea and a ridge of hills as the other boundaries.
 The largely low-lying county, dominated by clay in its north and alluvium on gravel in its south, was the second smallest county by area in 1831.
The South-East Region (coded IE024) is a NUTS Level III statistical region of Ireland.
 It consists of the territory of the city of Waterford and of the counties of Carlow, Kilkenny, South Tipperary, Wexford, and Waterford.
 The South-East region spans 9,406 km, 13.5% of the total area of the state and according to the 2006 census has a population of 460,838.
Middlesex Rugby is the governing body for rugby union in Middlesex, England; Middlesex is a historic county of England that has since been divided up and shared between Greater London, Surrey and Hertfordshire though the appellation is still in use when referring to sport, businesses and postal address in the area.
 Middlesex RFU was originally created as the Middlesex County Rugby Club but within six years was being referred to as the Middlesex County Rugby Football Union and is now known simply as Middlesex Rugby.
Tothill Fields was an 18th-century area of Westminster in the county of Middlesex that lay south of St James's Park on the north bank of the river Thames.
 One of its main features was a penitentiary.
 Between 1735 and 1752, it was the home venue of the Westminster Cricket Club for important cricket matches.
 The earliest known match there was on Saturday, 16 August 1735, when Westminster defeated London by 3 wickets. Records have survived of two Westminster matches there in 1752, both against Addington.
 The result of the first is unknown and Westminster won the second by 10 runs.
County Kilkenny () is a county in Ireland.
 It is in the province of Leinster and is part of the South-East Region.
 It is named after the city of Kilkenny.
 The county was based on the historic Gaelic kingdom of Ossory ("Osraige"), which is also the basis of the Diocese of Ossory.
 Kilkenny County Council is the local authority for the county.
 According to the 2011 census the population of the county is 95,419.
County Waterford (Irish: "Contae Phort Láirge" ; the English name comes from Old Norse "Vedrafjörður") is a county in the South-East Region of Ireland, in the province of Munster.
 It is named after the city of Waterford, which is derived from the Old Norse name "Veðrafjǫrðr" or "Vedrarfjord".
 There is an Irish-speaking area, Gaeltacht na nDéise, in the south-west of the county.
 Waterford City and County Council is the local authority for the county.
 The population of the county at large, including the city, is 113,795 according to the 2011 census.