Source: https://tendernation.io/opportunities/01a13cb9-c6e6-7369-9f72-6730150f6bb3/transport-for-london-tfl-four-line-modernisation-4lm-programme-to-upgrade awarded GB direct award procedure Suitable for SMEs # Transport for London (TfL) ~ Four-Line Modernisation (4LM) Programme to Upgrade the Sub-surface Tube Lines. [Office of Rail and Road](https://tendernation.io/buyers/office-of-rail-and-road) Estimated value £50,000 to £75,000 Published 1 Sept 2023 Deadline Closed 7 Jun 2023 ## Who can bid - Buyer says suitable for SMEs The buyer ticked “suitable for SMEs” on the notice. Anyone can still bid. - Small contract value Valued under £135,018 including VAT, the lowest Procurement Act threshold for goods and services. [More contracts for small businesses and VCSEs](https://tendernation.io/opportunities/for-small-businesses) ## About this tender Transport for London's (TfL) ~ four-line modernisation (4LM) programme to upgrade the sub-surface tube lines includes one of the largest and most technically complex software-based signalling system projects in the World. RSD has regulatory safety responsibility for oversight of the project and its ongoing phased operational implementation and is in receipt of multiple, serious, safety related Whistleblower disclosures. These matters are of a highly technical and complex nature which complainants assert could potentially lead to a catastrophic railway safety incident. Parts of this new signalling system are now in live operation across the sub-surface lines with further future deployments scheduled. A safety critical software expert team is needed to provide technical support to the RSD TfL team in discharging the above responsibilities. It is envisaged that delivery of the three phases set out below will take approximately 6 months. ## CPV classification Transport systems consultancy services Source Contracts Finder (UK) [View official notice](https://www.contractsfinder.service.gov.uk/notice/607ed9fe-1df5-4d5d-bc2c-65deba996f22) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. [Track tenders free](https://tendernation.io/register) [Buyer profile Office of Rail and Road: past awards and live tenders](https://tendernation.io/buyers/office-of-rail-and-road) [Sector More Architecture, engineering & surveying tenders](https://tendernation.io/sectors/architecture-engineering-surveying) ## More tenders like this [Architectural, construction, engineering and inspection services – Multi Operator Framework for Project Managers with Design/Technical Consultants for Educational Accommodation · Department of Education and Youth · 23 days left · 11 Nov 2026](https://tendernation.io/opportunities/01a156a9-cb77-70bf-a940-7366ca0959f7/ireland-architectural-construction-engineering-and-inspection-services-mul) [Construction project management services – Dietrich-Bonhoeffer-Gymnasium-Oberasbach – Neubau Mehrfachsporthalle · Landkreis Fürth · 28 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a156a9-ce57-722f-92f9-e818a29a32bc/germany-construction-project-management-services-dietrich-bonhoeffer-gymnasi) [Engineering services – Mission de Maîtrise d'oeuvre complète pour la construction de 111 logements VAULX-EN-VELIN (69120) - ZAC MAS DU TAUREAU Îlots J1/J2 · Alliade Habitat · 28 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a156a9-932d-7197-8cc1-ad619ede83e0/france-engineering-services-mission-de-maitrise-doeuvre-complete-pour-la-co) [Engineering studies – réalisation D'UN schéma directeur intercommunal d'assainissement · Charlieu-Belmont Communauté · 49 days left · 7 Dec 2026](https://tendernation.io/opportunities/01a156a9-9427-728b-9f2e-57d5081fa516/france-engineering-studies-realisation-dun-schema-directeur-intercommunal-d) [Architectural, construction, engineering and inspection services – Matthias-Claudius-Schule Tragwerk und Bauphysik · Stadt Kaarst - Der Bürgermeister · 36 days left · 24 Nov 2026](https://tendernation.io/opportunities/01a156a9-cc1c-708b-90a7-a22d2885c295/germany-architectural-construction-engineering-and-inspection-services-mat) [Engineering services – Sanierung der Festhalle Stöckwiese in Bietigheim, Freianlagenplanung · Gemeindeverwaltung Bietigheim · 28 days left · 16 Nov 2026](https://tendernation.io/opportunities/01a156a9-d828-701f-861f-726e9936bb48/germany-engineering-services-sanierung-der-festhalle-stockwiese-in-bietighei)