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. 

• Earthworks on the main site are underway.
• Area 2 east of Midland Main Line - VolkerFitzpatrick installing rail chord drainage and associated rail assets.

Dates for the off site road works:

• Work Section London Colney Roundabout  – white lining and some additional works taking place at night from 18th May 2026. Roundabout remains open.
• Work Section A414 westbound - works under way. Pedestrian Management, footpath diversion in place towards A414 underpass.
• These works create a new shared pedestrian cycle footpath
• Work Section Park Street Roundabout - 5 weeks of planned nights have been accommodated in days so far. The next block of night working will commence 26th May 2026 after the bank holiday.
• 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