Question: What English county does the River Gwash flow through and the village of Litter Casterton reside in?

Context articles: Brooke, Rutland
Claverton Pumping Station
Little Casterton
River Roach
River Gwash
Cowan Bridge School
Beacon Hill, Norfolk
Abbots Bromley
Surna (Norway)
Great Casterton

Brooke is a village and civil parish in the county of Rutland in the East Midlands of England.
 It is situated about three miles (4.8 km) south-west of Oakham.
 The village is near the source of the River Gwash near Braunston-in-Rutland; the river forms part of the parish boundary.
 From the 2011 census the population is included in the civil parish of Braunston-in-Rutland.
Claverton Pumping Station in the village of Claverton, in the English county of Somerset, pumps water from the River Avon to the Kennet and Avon Canal using power from the flow of the River Avon.
 It is a grade II listed building.
Little Casterton is a small village and civil parish in Rutland, England.
 The population of the civil parish at the 2001 census was 148, increasing to 218 at the 2011 census.
 It is about two miles (3 km) north of Stamford on a minor road that runs to the south of the River Gwash between Great Casterton and Ryhall.
The River Roach is a river that flows entirely through the English county of Essex.
 It is one of four main streams that originate in the Rayleigh Hills to the west, and flow east.
 They then flow towards the centre of the Rochford Basin, a circular feature which may have been caused by an asteroid impact in the Late Oligocene or Early Miocene periods.
 To the east of Rochford, the river becomes tidal, and is governed by the Crouch Harbour Authority.
 It joins the River Crouch between Wallasea Island and Foulness Island.
 To the west of Rochford, there is some doubt as to which of the four streams is officially the Roach.
The River Gwash, a tributary of the River Welland, flows through the English counties of Leicestershire, Rutland and Lincolnshire.
 It rises just outside the village of Knossington in Leicestershire, near the western edge of Rutland.
 It is about 20 mi long.
Cowan Bridge School refers to the Clergy Daughters' School, a school mainly for the daughters of middle class clergy founded in the 1820s.
 It was first located in the village of Cowan Bridge in the English county of Lancashire, where it was attended by the Brontë sisters.
 Two of the sisters, Maria and Elizabeth died from tuberculosis in the aftermath of a typhoid outbreak at the school.
 In the 1830s the school moved to Casterton, a few miles away, where it was amalgamated with another girls' school.
 The institution survived to the twenty-first century as Casterton School.
Beacon Hill is the highest point in the English county of Norfolk.
 The hill is located 0.75 mi south of the village of West Runton on the North Norfolk coast.
 At its summit the hill is 103 m above sea level.
 The hill is also known as Roman Camp.
 The summit and surrounding woodlands are now in the care of the National Trust.
 A track, named Calves Well Lane, running west from Sandy Lane leads to a car park which is maintained by donations made to the National Trust collection box provide on the edge of the car park.
 Litter bins and benches make Beacon Hill an ideal location for picnics.
 There are several footpaths to follow across the area.
Abbots Bromley is a village and civil parish within the English county of Staffordshire, England.
 A notably affluent part of the county, Abbots Bromley was rated the best place to live in the Midlands by the "Sunday Times" in 2013 and again in 2016.
 The village is a regular entrant and often winner of the Staffordshire Best Kept Village Competition which takes place across the county each year.
 Organised by the Community Council of Staffordshire there is a best-kept village award for a large and small village in each of the county's Districts and Boroughs.
 Whilst down the years the East Staffordshire district prize has been awarded to Abbots Bromley on a number of occasions the overall county title continues to elude.
 In August 2017 the village won the double honour of winning both the best kept village and community council trophy award, a double not achieved for many years.
 Through the competition Abbots Bromley maintains a healthy rivalry with nearby Yoxall, also a regular winner in the East Staffordshire section.
The Surna is a river in Rindal and Surnadal municipalities in Møre og Romsdal county, Norway.
 The 45 km long river begins near Øvre Rindal at the confluence of the rivers Tiåa and Lomunda.
 The river then flows west and empties into the Surnadalsfjorden at the village of Surnadalsøra.
 Several smaller rivers flow into the Surna from the Trollheimen mountains to the south.
 The Foldsjøen and Gråsjøen reservoirs along the Folda River also flow into the Surna.
 The river is a good fishing river.
 The Brandåa, Gryta, and Kysinga hydroelectric power stations operate on tributaries of the river.
Great Casterton is a village and civil parish in the county of Rutland in the East Midlands of England.
 It is located at the crossing of the Roman Ermine Street and the River Gwash.