Question: In 2011, which of the nine official regions of England abolished the Blackburn with Darwen tPCT in April 2013?

Context articles: North West England
South West England
North East England
East of England
Lower Darwen
South East England
Bill Taylor (English politician)
Blackburn
Blackburn with Darwen Teaching Primary Care Trust
Yorkshire and the Humber

North West England, one of nine official regions of England, consists of the five counties of Cheshire, Cumbria, Greater Manchester, Lancashire and Merseyside.
 The North West had a population of 7,052,000 in 2011.
 It is the third most populated region in the United Kingdom after the South East and Greater London.
South West England is one of nine official regions of England.
 It is the largest in area, covering 9200 sqmi and the counties of Gloucestershire, Bristol, Wiltshire, Somerset, Dorset, Devon and Cornwall, as well as the Isles of Scilly.
 Five million people live in South West England.
North East England is one of nine official regions of England at the first level of NUTS for statistical purposes.
 It covers Northumberland, County Durham, Tyne and Wear, and the area of the former county of Cleveland in North Yorkshire.
 The region is home to three large conurbations: Teesside, Wearside, and Tyneside, the latter of which is the largest of the three and the eighth most populous conurbation in the United Kingdom.
 There are only three cities in the region; Newcastle upon Tyne is the largest city in the region with a population of just under 280,000, followed by Sunderland, both of which are located in the metropolitan county of Tyne and Wear.
 The city of Durham is the county town of County Durham.
 Other large settlements in the region include Darlington; Gateshead; Hartlepool; Middlesbrough; South Shields; Stockton-on-Tees and Washington.
 In common parlance, and geographically, more of north Yorkshire would usually be regarded as part of north-east England.
The East of England is one of nine official regions of England at the first level of NUTS for statistical purposes.
 It was created in 1994 and was adopted for statistics from 1999.
 It includes the ceremonial counties of Bedfordshire, Cambridgeshire, Essex, Hertfordshire, Norfolk and Suffolk.
 Essex has the highest population in the region.
Lower Darwen is a village in the unitary borough of Blackburn with Darwen, contiguous with the town of Darwen, in the county of Lancashire.
 It is located between the towns of Blackburn and Darwen.
 Nearby places include Ewood and Blackamoor.
 It is situated in the valley of the River Darwen.
 The former township of Lower Darwen, abolished in the 1890s, extended south to Earnsdale Brook, and included areas now in the town of Darwen.
South East England is the most populous of the nine official regions of England at the first level of NUTS for statistical purposes.
 It consists of Berkshire, Buckinghamshire, East Sussex, Hampshire, the Isle of Wight, Kent, Oxfordshire, Surrey and West Sussex.
 As with the other regions of England, apart from Greater London, the south east has no elected government.
Sir Bill Taylor (born 1952) is the former leader of Blackburn with Darwen Council in England and election agent for Blackburn MP and former Justice Minister Jack Straw from 1979 to 2010.
 He was Mayor of the Borough of Blackburn from 1989–90 and was knighted in 2003 for services to local government.
 From its creation in the late 1990s, Blackburn with Darwen was Council of the Year twice.
 He was approached to assume the role of Chair of 3rd Sector Lancashire to coordinate Lancashire's 4,500+ voluntary groups.
 From 2009 till 2013 he chaired the Blackburn with Darwen ground breaking NHS Care Trust Plus.
Blackburn is a large town in Lancashire, England.
 It lies to the north of the West Pennine Moors on the southern edge of the Ribble Valley, 9 mi east of Preston, 20.9 mi NNW of Manchester and 9 mi north of the Greater Manchester border.
 Blackburn is bounded to the south by Darwen, with which it forms the unitary authority of Blackburn with Darwen; Blackburn is its administrative centre.
 At the time of the UK Government's 2001 census, Blackburn had a population of 105,085, whilst the wider borough of Blackburn with Darwen had a population of 140,700.
 Blackburn had a population of 117,963 in 2011, a massive increase since 2001.
Blackburn with Darwen tPCT was a UK National Health Service Primary Care Trust, responsible for commissioning & purchasing of health care in Blackburn with Darwen in Lancashire.
 It came under the North West of England's NHS Strategic Health Authority (SHA).
 It was abolished in April 2013.
Yorkshire and the Humber is one of nine official regions of England at the first level of NUTS for statistical purposes.
 It comprises most of Yorkshire (South Yorkshire, West Yorkshire, the East Riding of Yorkshire including Hull, the shire county of North Yorkshire and the City of York), North Lincolnshire and North East Lincolnshire.
 It does not include Middlesbrough or Redcar and Cleveland (which are in the ceremonial county of North Yorkshire but not in the shire county).
 The population in 2011 was 5,284,000.