From this initial concept and design stage which involved rigorous calculations and constraints due to the design and environment of the tunnels, an acceptable panel design was achieved and accepted.
Wiremek have since been tasked to manufacture these panels which total 31 in number which involved full technical drawings and close liaison with the tunnel PLC specialist.
These panel drawings were approved by independent CAT/SIL checkers to all European transport and safety requirements prior to commencement of manufacture.