Collis Engineering Ltd have been awarded a provisional Network Rail Principal Contractor License.
This accreditation was issued following an audit in accordance with the Network Rail Principal License Scheme NR/L2/INI/CP0070.
The On-site works for Collis Engineering are undertaken by Collis Civil Engineering, a trading division of Collis Engineering Ltd, a member company of the Signal House Group.
The first contractual works being undertaken against this License will be on the North London Lines Project.