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Station IX (formerly known as the Inter-Services Research Bureau) was a secret British Special Operations Executive factory making special weapons and equipment during World War II. The small Welbike paratrooper's motorcycle and the Welrod assassination weapon were both products of the station.

Hertfordshire ( (listen) HART-fərd-sheer or -⁠shər; often abbreviated Herts) is one of the home counties in southern England. It borders Bedfordshire and Cambridgeshire to the north, Essex to the east, Greater London to the south, and Buckinghamshire to the west. For government statistical purposes, it forms part of the East of England region. Hertfordshire covers 634.366 square miles (1,643.00 km2). It derives its name – via the name of the county town of Hertford – from a hart (stag) and a ford, as represented on the county's coat of arms and on the flag. Hertfordshire County Council is based in Hertford, once the main market town and the current county town. The largest settlement is Watford. Since 1903 Letchworth has served as the prototype garden city; Stevenage became the first town to expand under post-war Britain's New Towns Act of 1946. In 2013 Hertfordshire had a population of about 1,140,700, with Hemel Hempstead, Stevenage, Watford and St Albans (the county's only city) each having between 50,000 and 100,000 residents. Welwyn Garden City, Hoddesdon and Cheshunt are close behind with around 47,000 residents. Elevations are higher in the north and west, reaching more than 800 feet (240 m) in the Chilterns near Tring. The county centres on the headwaters and upper valleys of the rivers Lea and the Colne; both flow south, and each is accompanied by a canal. Hertfordshire's undeveloped land is mainly agricultural, with much of it protected by green-belt policies. Services have become the largest sector of the county's economy. Hertfordshire is well served with motorways and railways for access to London, the Midlands and the North. See the List of places in Hertfordshire and also List of settlements in Hertfordshire by population articles for extensive lists of local places and districts.

Ayot was a railway station serving Ayot St Peter near Welwyn Garden City in Hertfordshire, England. It was on the branch line to Dunstable.

Ayot St Peter is a village and civil parish in the Welwyn Hatfield district of Hertfordshire, England, about two miles north-west of Welwyn Garden City. According to the 2001 census it had a population of 166. At the 2011 Census the population including the nearby Ayot Green and Ayot St Lawrence was 245.

Sherrardspark Wood (grid reference TL230139) is a 74.9 hectare (185.1 acre) biological site of Special Scientific Interest in Welwyn Garden City, Hertfordshire. The site was notified in 1986 under the Wildlife and Countryside Act 1981.It is located to the north west of Welwyn Garden City and is an ancient woodland consisting mainly of Sessile oak and Hornbeam. It is used by dog walkers, joggers, cyclists, and horse riders. The area was designated by English Nature a Site of Special Scientific Interest in 1986 as well as a Local Nature Reserve in 1998. The Sherrardspark Wood Wardens' Society assists with the maintenance of the wood. There are a number of walks through the wood, one of which follows the disused Luton/Dunstable branch line from Welwyn Garden City railway station. This line closed in the 1970s and runs from the White Bridge on Digswell Road west and then north to the Great North Road next to the A1(M) motorway, close to the Red Lion pub. The trail continues from Ayot St Peter on the other side of the motorway along Ayot Greenway.

Stanborough Reedmarsh is a 3.3 hectare Local Nature Reserve in Welwyn Garden City in Hertfordshire. It is owned by Welwyn Hatfield Borough Council and managed by the Herts and Middlesex Wildlife Trust.The site is wet willow woodland on the bank of the River Lea. It is important for water voles and birds such as reed and sedge warblers. Water figwort, common meadow rue and water chickweed grow along the river bank.There is access to the site from Stanborough Road through Stanborough Park.

Monk's Walk School is a secondary school with academy status located on the outskirts of Welwyn Garden City, Hertfordshire, England. It opened in 1964 and became an Academy in 2012. The school's motto is: "Excellence for All". The school's annual student intake is approximately 220 eleven- and twelve-year-olds of both sexes, with 1,324 students throughout the school. It also has approximately 185 teachers and staff.

Ayot Green is a hamlet in Hertfordshire, England and is near the A1(M) Motorway, close to Welwyn Garden City. It is a typical traditional English village, centred on a village green. There are several other Ayots in the area, including Ayot St Lawrence and Ayot St Peter (where in 2011 The Census was included), and it also gives name to the rail trail called Ayot Greenway which stretches from Ayot Green to Wheathampstead.

Welwyn Rural District was a rural district in Hertfordshire, England from 1894 to 1974, covering an area in the centre of the county.

Welwyn is a village and civil parish in Hertfordshire, England. The parish also includes the villages of Digswell and Oaklands. It is sometimes referred to as Old Welwyn or Welwyn Village, to distinguish it from the much newer and larger settlement of Welwyn Garden City, about a mile to the south.

Guessens is a Grade II* listed timber-framed house at 6 Codicote Road, Welwyn, in Hertfordshire, England. It was built in the early 17th century and has later additions. From 1730 to 1765 it was the residence of the poet and dramatist Edward Young, who was also rector of Welwyn.

Digswell Park is a cricket ground in Welwyn Garden City, Hertfordshire. The first recorded match on the ground was in 1866 between The Node and Southgate. In 2000, the ground hosted its only Minor Counties Championship match to date, which was between Hertfordshire and Cambridgeshire. In 2003, the ground hosted 2 MCCA Knockout Trophy matches. Hertfordshire resumed their usage of Digswell Park and have to date played 4 further MCCA Knockout Trophy matches on the ground.The ground has played host to 3 List-A matches, the first of which came in the 2000 NatWest Trophy between Hertfordshire and Cambridgeshire, with the second List-A match coming in the 2001 Cheltenham & Gloucester Trophy between Hertfordshire and the Durham Cricket Board. The third and final List-A match played on the ground was between Hertfordshire and Staffordshire in the 2002 Cheltenham & Gloucester Trophy.In local domestic cricket, Digswell Park is the home ground of Welwyn Garden City Cricket Club who play in the Home Counties Premier Cricket League.