[2] The earliest known surviving records of Harwell's name are 10th-century Saxon charters now reproduced in the Cartularium Saxonicum.

[4] The west tower may have been at the same time, but its Early English Gothic bell openings suggest that it may not have been finished until the middle of the 13th century.

[7] John Taylor & Co of Loughborough cast the treble and second bells in 1932,[7] completing the present ring.

St. Matthew's also has a Sanctus bell cast by Robert I Wells[7] of Aldbourne,[6] Wiltshire in the 18th century.

[17] The Crown in the High Street was converted into a nursing home, which was run by Southern Cross Healthcare and ceased trading in 2012.

[16] On 4 April 1899, Berkshire Constabulary PC John Charlton was killed in an affray outside the Chequers.

His two killers were felled and arrested by another officer, PC Thomas Hewett and later sentenced to 20 years hard labour for manslaughter.

Originally the nearest station was Steventon, about 2 miles (3 km) northwest of Harwell, which the Great Western opened in 1840.

The airfield was used in World War II to launch troop-carrying military gliders for the invasion of Normandy.

Other parts of the airfield were later used by other scientific organisations, including the Science and Technology Facilities Council's Rutherford Appleton Laboratory which runs the ISIS neutron source and hosts the Diamond Light Source synchrotron joint venture.

The former airfield site as a whole is now the Harwell Science and Innovation Campus and is managed by the Australian-based Goodman property group.

Harwell Feast is a celebration held on the Monday of the Late May Bank Holiday each year.

The recreation ground hosts fund-raising stalls and displays including sheepdog handling and historic cars.

[27] Route 98 links Harwell village and campus with Didcot via the Great Western Park housing estate.

Route X32 links Harwell village and campus with Didcot, Milton Park, and Oxford daily, and from Mondays to Saturdays also serves Wantage.

[29] Route 34 is a limited service between Wantage, Harwell campus and Oxford that runs from Mondays to Fridays only.