Heathrow Airport has awarded BAM Nuttall a contract valued at more than £85m to undertake refurbishment work on the main and cargo access tunnels to the airport.
The contractors will be working in partnership with M&E specialist VVB Engineering on the job.
Work is due to start later this month with a completion date of the end of February 2016.
Keeping the tunnels open during the work is vital to avoid disruption to the UK’s hub airport which means work to refurbish and improve the tunnel ventilation systems and upgrading the fire detection, suppression and alarm systems will take place over night and during pre planned lane closures.
M&E specialist VVB and BAM first worked together on the upgrade to the north bound bore of the Blackwall Tunnel under the Thames in London.
The main 630m twin bore tunnel was built in 1950s and is the primary entrance to the central terminal area.
The cargo tunnel, built in 1960s, is longer at 830m and comprises 630m of bored tunnel and 100m of ‘cut and cover’ sections at each end.