Memorials & monuments · London
General Roy's Baseline (Northwest End) Cannon Monument
In or near Colnbrook.
General Roy's Baseline (Northwest End) Cannon Monument is a memorial in the United Kingdom.
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Wikimedia Commons contributors — see linked file page for photographer and licence licence
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Plan your visit
- Typical visit
- 15 min–45 min
- Nearest railway station
- Heathrow Terminals 2 & 3 · 0.9 km
- Free entry
- Dog-friendly
About
General Roy's Baseline (Northwest End) Cannon Monument is a public memorial in London, recording local sacrifice and named in the parish register of war and civic monuments. Built or established in 1791, it dates from the Georgian period. The site is within the Chilterns National Landscape (AONB). It sits within the Hayes and Harlington parliamentary constituency. The nearest railway station is Heathrow Terminals 2 & 3, about 0.9 km away. Postcode area TW6.
Photo gallery
See it from the streetimagery from 2026
Imagery © Mapillary contributors, CC BY-SA 4.0
Official information
The Three Magpies is a historical pub located in Heathrow, offering a warm atmosphere and a variety of food and drink options. It serves as a convenient stop for travelers and locals alike, featuring amenities such as a beer garden and disabled facilities.
Protected designations
- Area of Outstanding Natural Beauty: Chilterns
Designations sourced from Natural England open data under OGL v3.
Place summary
General Roy's Baseline (Northwest End) Cannon Monument is a memorial located in Hillingdon, London. Established in 1791, this Georgian-era monument marks a significant point in surveying history. It is situated within the Chilterns Area of Outstanding Natural Beauty (AONB).
AI-generated from the structured facts on this page (operator, designation, listing, era). Not a substitute for visiting.
- Coordinates
- 51.4798, -0.4503
- District
- Hillingdon
- Parish
- Hillingdon, unparished area
- Postcode
- TW6 2FG
- Parliamentary constituency
- Hayes and Harlington
- Phone
- +442087591071
- Established
- 1791
- Nearest railway station
- Heathrow Terminals 2 & 3 — 0.9 km
- Official site
- www.greeneking.co.uk
Sources
- osm: n2592136008 (ODbL)
- commons: Where it all began! (geograph 2651652).jpg (CC BY-SA 4.0)
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Frequently asked questions
- Where is General Roy's Baseline (Northwest End) Cannon Monument?
- General Roy's Baseline (Northwest End) Cannon Monument is in London, United Kingdom (postcode TW6 2FG), in the parish of Hillingdon, unparished area.
- What is General Roy's Baseline (Northwest End) Cannon Monument?
- General Roy's Baseline (Northwest End) Cannon Monument is a memorial in the United Kingdom.
- How do I get to General Roy's Baseline (Northwest End) Cannon Monument?
- The nearest railway station is Heathrow Terminals 2 & 3, about 0.9 km away. Drivers can use postcode TW6 2FG.
- When was General Roy's Baseline (Northwest End) Cannon Monument built?
- Built or established in 1791.
- Is General Roy's Baseline (Northwest End) Cannon Monument a protected site?
- Yes — General Roy's Baseline (Northwest End) Cannon Monument is part of the Chilterns National Landscape (AONB).
- Is General Roy's Baseline (Northwest End) Cannon Monument free to visit?
- Yes, General Roy's Baseline (Northwest End) Cannon Monument is free to enter.
- How do I get to General Roy's Baseline (Northwest End) Cannon Monument?
- The nearest railway station is Heathrow Terminals 2 & 3, about 0.9 km away. Drivers can navigate to postcode TW6 2FG.