The programme, officially referred to as the Four Lines Modernisation (4LM), will renew the current signalling systems and bring in advanced automated train control across 40% of the underground network.

Its investment to increase reliability and frequency of trains, forms part of LU’s wider £5.4bn investment in its sub-surface railway.

Mace and CPC will provide a review of the 4LM programme, develop an integrated programme and support 4LM’s leadership team with collaboration across the programme and look at how the programme partners are incentivised throughout the scheme. The initial commission will run for eight months.

David Martin, programme director for Mace, said: “There are already some excellent partners on board and we’re looking to complement their skills, bring insight from our work on major programmes and help deliver this critical scheme for London’s transport network.”

Steve Mole, Partner at CPC, said: “The CPC/Mace team will bring our expertise in leading the delivery of complex systems and projects in transport to 4LM.

“We will work in partnership with London Underground and its supply chain to engage collaboratively and drive improvements to services and capacity for the tube.”

The appointment extends a successful working relationship between Mace and CPC, who are already working together on Transport for London’s Tramlink programme and as part of joint delivery partner consortium for LU’s Crossrail and stations programme.