|Elevation AMSL||230 ft / 70 m|
Radlett Aerodrome was an airfield and aircraft manufacturing plant in Hertfordshire owned by Handley Page, where the company was headquartered. Part of the airfield is now the M25 between junctions 21 (A405) and 22 (A1081).
The Handley-Page works were situated on the east of the former A5, then a main road into London from the Midlands. The site is between the A5, to the west, and the Midland Main Line, to the east. The M25 crosses the entire former site from east to west.