S&C South Alliance

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With a million more trains on the railways today than a decade ago, we deliver crucial S&C renewals in the South of the UK using an ‘Alliance’ approach, combining the skills of contractor, designer and client.

Colas Rail Ltd, AECOM and Network Rail are working together in the guise of the S&C South Alliance to efficiently and effectively deliver this complex programme of works within a challenging access regime and alongside a range of other client maintenance and enhancement activities. The Alliance model means Network Rail and its delivery partners will work together with aligned goals and objectives to efficiently deliver S&C works.
It is not all about track works either, the Alliance undertakes all aspects associated with multi-disciplinary renewal and has sufficiently developed its offering such that it is a ‘go to’ mechanism for Network Rail to deliver complete enhancement works.
The S&C work is part of Network Rail’s track renewals programme for the 2014-19 funding period, where it will renew more than 7,000km of track as part of a £25bn investment programme to build a bigger, better railway for Britain.

Leading by Our Values



At the forefront of everything we do. We have an absolute commitment to safety, health, environment and quality.


Profit is freedom. We look after our shareholders and guarantee that they see value for money and a profitable business.


Quality is key to competitiveness. We believe in delivering on time and on budget a high quality product, which we are proud of.


We have respect for our colleagues, our clients and the environment.
“We are committed to building on our 16 year UK track record in renewals through continuous innovation and investment in our people and technology.”

Ondrej Roubicek, Managing Director of Track Renewals, Colas Rail UK

“We look forward to working with Colas URS to help deliver a massive programme of work to maintain, renew and enhance the railway across southern England and Wales over the next five years, with the goal of providing a more reliable railway for passengers and freight.”

Steve Featherstone, Network Rail track programme director

Contact us

Would you like to discuss an upcoming project? Contact us. Alternatively, you may wish to see a map of our active locations across various departments and entities, to schedule a face to face meeting.