Current construction activity

Thank you for visiting our current construction page. This will be regularly updated for the latest activities. 

In the meantime, please contact us with any questions. 

• STRABAG and subcontractors have bedded into site.
• Earthworks on the main site are underway.
• Area 2 east of Midland Main Line - VolkerFitzpatrick installing rail chord drainage and cabling
• Road Works see below

Dates for the off site road works:

• Work Section London Colney Roundabout  – completed.
• Work Section A414 westbound - commenced 16/02/2026. Duration 25 weeks. Day time works. Traffic management westbound only. Maintaining two narrow lanes – full time with a speed restriction of 30mph for the safety of both road users and our workforce. Pedestrian Management, footpath access to remain open fulltime.
• These works create a new shared pedestrian cycle footpath
• Work Section Park Street Roundabout - planned to commence 07/04/2026. Duration 65 weeks. Combination of off peak days and night works. Closures and diversions will be notified.
• These works create - an additional A405 entry lane - an A414 (east arm) exit lane - a third circulatory carriageway lane - signalisation on the A414 and A405 arms which allows easier access onto the roundabout from Park Street and Watling Street - Improvements to the A405 pedestrian crossing - increased drainage capacity to mitigate against current and future flooding - upgrades to existing services 
• Work Section A414 new roundabout development access - awaiting dates 2026
• Work Section Radlett Road A5183 southern access junctions  - awaiting dates 2027
• Work Sections M25 Junction 21a & Junction 22 works - awaiting dates 2027 

Country Park Works

• Woodland management
• CMCS Fisheries lake management
• PROW works
• New planting