Question: In what country is the county of Berkshire and the Thames Valley located?

Context paragraphs:
Reading Town Regatta: Reading Town Regatta is Reading's rowing regatta.  It takes place at the town of Reading in Berkshire on the River Thames in southern England, near the Thames Valley Park business park on the south side of the river.  A more local Thames Valley Park Regatta takes place at the same location.

Sara Thornton (police officer): Sara Joanne Thornton, {'1': ", '2': ", '3': ", '4': "} (born 27 December 1962) is a British police officer who is the first head of the National Police Chiefs' Council (NPCC) and the former Chief Constable of Thames Valley Police and Vice President of the Association of Chief Police Officers (ACPO).  She is the second consecutive head of the Thames Valley Police to move onto leadership of a national policing body; at Thames Valley she replaced former Chief Constable Peter Neyroud who, in January 2007, moved to the role of Chief Executive of the National Policing Improvement Agency.

Slough: Slough ( ) is a large town in Berkshire, England, on the western fringes of the Greater London Urban Area, 20 mi west of central London, 3 mi north of Windsor, 6 mi east of Maidenhead, 12 mi south-east of High Wycombe and 20 mi north-east of Reading.  Sitting at the gateway between the Thames Valley and London and at the intersection of the M4, M40 and M25 motorways, it offers easy road access to the rest of the UK.

Thames Valley Police: Thames Valley Police, formerly known as Thames Valley Constabulary, is the territorial police force responsible for policing the Thames Valley area covered by the counties of Berkshire, Buckinghamshire and Oxfordshire.

Thames Valley: The Thames Valley is an informally-defined sub-region of South East England, centred on the River Thames west of London, with Oxford as a major centre.  Its boundaries vary with context.  The area is a major tourist destination and economic hub, includes part of the M4 corridor, and is sometimes referred to as England's Silicon Valley due to the concentration of high-technology companies.  The area east of Reading is defined by Natural England as the Thames Valley National Character Area, while Thames Valley Police cover the counties of Berkshire, Buckinghamshire and Oxfordshire.

Thames Valley Rugby Football Union: The Thames Valley Rugby Football Union (TVRFU) is the governing body of rugby union in the region of Thames Valley in the North Island of New Zealand.  Their senior representative team compete in the Heartland Championship.  Thames Valley Rugby Football Union was founded in 1921 when it broke away from the now defunct South Auckland Rugby Football Union.  The Thames Rugby Union, a sub-union that had remained affiliated with the Auckland Rugby Football Union, eventually joined the Thames Valley Union in 1951.

ITV Thames Valley: ITV Thames Valley was a non-franchise ITV news region covering the Thames Valley area of the United Kingdom from 4 December 2006 until 8 February 2009.  It served the south/south-eastern area of the legal Central franchise and the north/north-western area of the legal Meridian franchise.  In its first year, its flagship news programme "Thames Valley Tonight" won the Royal Television Society's Southern Centre Award for News Magazine Programme of the Year for its coverage of the 2007 summer floods.

Thames Valley Cricket League: The Thames Valley Cricket League is a mostly amateur cricket league, catering to clubs geographically to the west of London, with clubs coming from Berkshire, Buckinghamshire, Hampshire, Hertfordshire, Middlesex, Oxfordshire and Surrey, though most are from Berkshire and Buckinghamshire.  The league, once the top level of amateur cricket in the area, has become a feeder league for the Home Counties Premier Cricket League since the creation of the Premier League, however the standard of the league is considered to be high, evidenced by the proliferation of Thames Valley League sides in the Premier Leagues, as well as the large uptake of expansion places in the league.

Cippenham: Cippenham is a suburb of the unitary authority of Slough in the county of Berkshire, England.  It was transferred to Berkshire from Buckinghamshire in 1974.  Slough became a unitary authority on 1 April 1998, with the abolition of Berkshire County Council and the 1973–1998 Borough.

Thames Valley Police and Crime Commissioner: The Thames Valley Police and Crime Commissioner is the police and crime commissioner, an elected official tasked with setting out the way crime is tackled by Thames Valley Police in the ceremonial English counties of Berkshire, Buckinghamshire and Oxfordshire.  The post was created in November 2012, following an election held on 15 November 2012, and replaced the Thames Valley Police Authority.  The current incumbent is Anthony Stansfeld, who represents the Conservative Party.

Supporting paragraphs: Cippenham Slough
Answer: England