The Airports Commission has backed a third Heathrow runway, saying it will add £147bn in economic growth and 70,000 jobs by 2050.
But the report says a third runway should come with severe restrictions, including a ban on night flights and limits on noise.
It is now up to the government to accept or reject the proposal.
Briggs & Forrester have expert infrastructure experience following their work on the Gatwick North Terminal in Sussex.
The extension to Gatwick Airport North Terminal provided the space needed to accommodate the ever increasing numbers of passengers flying from Gatwick.
Mechanical and Electrical services included ventilation, BMS, fire alarms, lighting and domestic water services.
The services value of the work was £6,200,000 with a contract period of 15 months.
To read more about the plans for UK aviation click here