located_in_the_administrative_territorial_entity blackwater valley path
The ___MASK60___ ___MASK53___ rises at ___MASK99___ near Bidden Grange Farm between Upton Grey and Greywell in ___MASK23___ , England . It flows northeast and is a tributary of the ___MASK60___ Blackwater near Swallowfield . Its headwaters flow over chalk and there is little pollution making the ___MASK60___ ___MASK53___ rich in wildlife . It was noted on Jansson ' s map of ___MASK23___ of 1646 . ___MASK58___ is the capital and ___MASK78___ populous city ___MASK87___ England and the United Kingdom , as well as the ___MASK78___ populous city proper in the European Union . Standing on the River Thames in the south east ___MASK87___ the island ___MASK87___ Great Britain , ___MASK58___ has been a major settlement for two millennia . It was founded by the Romans , who named it " Londinium ". ___MASK58___ ' s ancient core , the City ___MASK87___ ___MASK58___ , largely retains its medieval boundaries . Since at least the 19th century , " ___MASK58___ " has also referred to the metropolis around this core , historically split between Middlesex , Essex , ___MASK45___ , Kent , and Hertfordshire , which today largely makes up Greater ___MASK58___ , governed by the Mayor ___MASK87___ ___MASK58___ and the ___MASK58___ Assembly . Greywell is a small village and civil parish in ___MASK23___ , England . ___MASK41___ is a country that is part ___MASK87___ the United Kingdom . It shares land borders with Scotland to the north and Wales to the west . The Irish Sea lies northwest ___MASK87___ ___MASK41___ and the Celtic Sea lies to the southwest . ___MASK41___ is separated from continental Europe by the North Sea to the east and the English Channel to the south . The country covers five - eighths ___MASK87___ the island ___MASK87___ Great Britain ( which lies in the North Atlantic ) in its centre and south ; and includes over 100 smaller islands such as the Isles ___MASK87___ Scilly , and the Isle ___MASK87___ Wight . ___MASK23___ (; abbreviated Hants , archaically known as the County of Southampton ) is a county on the southern coast of England in the United Kingdom . The county town of ___MASK23___ is Winchester , the former capital city of England . ___MASK23___ is the most populous ceremonial county in the United Kingdom ( excluding the metropolitan counties ) with almost half of the county ' s population living within the South ___MASK23___ conurbation which includes the cities of Southampton and Portsmouth . The larger South ___MASK23___ metropolitan area has a population of 1 , 547 , 000 . ___MASK23___ is notable for housing the birthplaces of the Royal Navy , British Army , and Royal Air Force . It is bordered by Dorset to the west , Wiltshire to the north - west , Berkshire to the north , Surrey to the north - east , and West Sussex to the east . The southern boundary is the coastline of the English Channel and the Solent , facing the Isle of Wight . Chalk is a soft , white , porous , sedimentary carbonate ___MASK76___ , a form ___MASK87___ limestone composed ___MASK87___ the mineral calcite . Calcite is an ionic salt called calcium carbonate or CaCO . It forms under reasonably deep marine conditions from the gradual accumulation ___MASK87___ minute calcite shells ( coccoliths ) shed from micro - organisms called coccolithophores . Flint ( a type ___MASK87___ chert unique to chalk ) is very common as bands parallel to the bedding or as nodules embedded in chalk . It is probably derived from sponge spicules or other siliceous organisms as water is expelled upwards during compaction . Flint is often deposited around larger fossils such as Echinoidea which may be silicified ( i . e . replaced molecule by molecule by flint ). Swallowfield is a village and civil parish in ___MASK85___ , England , about ___MASK13___ ___MASK87___ Reading , and north ___MASK87___ the county boundary with ___MASK23___ . The Blackwater Valley Path follows the ___MASK60___ Blackwater from its source in Rowhill , ___MASK79___ to just beyond the point where it joins the ___MASK60___ ___MASK53___ near Swallowfield to become the Broadwater . This long - distance route covers 23 miles / 37 km and closely follows the ___MASK60___ Blackwater using public rights - ___MASK87___ - way as well as permissive footpaths and is waymarked . It is looked after by the Blackwater Valley Countryside Partnership . The ___MASK45___ Heath section includes informal parks on reclaimed land at Blackwater Park and Watchmoor . ___MASK83___ is a local government ___MASK52___ and borough in ___MASK23___ , England . It covers the towns of Aldershot and Farnborough . A conurbation is a region comprising a number ___MASK87___ cities , large towns , and other urban areas that , through population growth and physical expansion , have merged to form one continuous urban or industrially developed area . In most cases , a conurbation is a polycentric urbanised area , in which transportation has developed to link areas to create a single urban labour market or travel to work area . ___MASK85___ ( or , abbreviated Berks ) is a county in ___MASK49___ , west ___MASK87___ London . It was recognised as the Royal County ___MASK87___ ___MASK85___ because ___MASK87___ the presence ___MASK87___ Windsor Castle by the Queen in 1957 and letters patent issued in 1974 . ___MASK85___ is a county ___MASK87___ historic origin and is a home county , a ceremonial county and a non - metropolitan county without a county council . ___MASK85___ County Council was the main county governance from 1889 to 1998 except for the separately administered County Borough ___MASK87___ Reading . Upton Grey is a village and civil parish in ___MASK23___ , England . The ___MASK29___ / ___MASK79___ built - up area or Blackwater Valley Conurbation or ___MASK79___ Urban Area is the name used by the ONS to refer to the loose conurbation on the border between ___MASK45___ , Berkshire and ___MASK23___ in England . They give it a population of 252 , 937 in 2011 up by around 4 % from the 2001 figure of 243 , 344 . This makes it the 29th largest built up area in England and Wales . ___MASK36___ is a town in ___MASK45___ , England , within the Borough of Waverley . The town is WSW of London in the extreme west of ___MASK45___ , adjacent to the border with ___MASK23___ . By road Guildford is 11 miles ( 17 km ) to the east and Winchester a further 28 miles ( 45 km ) along the same axis as London . ___MASK36___ is the largest town in Waverley , and one of the five largest conurbations in ___MASK45___ . It is of historic interest , with many old buildings , including a number of Georgian houses . ___MASK36___ Castle overlooks the town . A short distance southeast of the town centre are the ruins of Waverley Abbey , Moor Park House and Mother Ludlam ' s Cave . ___MASK36___ is twinned with Andernach in Germany . It is drained by the River Wey ( North Branch ) which is navigable only to canoes at this point . ___MASK15___ is a town in ___MASK45___ , England , southwest of Central London , between the M3 and M4 motorways . The town is in the far west of the county , close to the borders of ___MASK23___ and Berkshire ; the boundaries intersect on the western edge of the town where all three counties converge on the A30 national route . It is the main town in the borough of ___MASK45___ Heath . ___MASK15___ ' s suburbs include Crawley Hill , Yorktown , Diamond Ridge , Heatherside , and Old Dean . ___MASK79___ is a town in the English county ___MASK87___ ___MASK23___ , located on heathland about southwest ___MASK87___ London . The area is administered by Rushmoor Borough Council . The town has a population ___MASK87___ 36 , 321 , while the Farnborough / ___MASK79___ Built - up Area , a loose conurbation ( which also includes other towns such as Camberley , Farnborough , and Farnham ) has a population ___MASK87___ 243 , 344 , making it the thirtieth - largest urban area in the UK . A town is a human settlement larger than a village but smaller than a city . The size definition for what constitutes a " town " varies considerably in different parts ___MASK87___ the world .