Construction of railways and underground railways
SIC code 42120 · 3,935 companies on the UK register list this activity. Newest first.
- Eden Hope Consult Limited17010133 · Chelmsford · since 3 February 2026Active
- Mta Rail Ltd17007972 · Luton · since 2 February 2026Active
- NGB Consulting Solutions Ltd17002313 · London · since 30 January 2026Active
- Jam Rail Engineering Ltd16998472 · Peterborough · since 29 January 2026Active
- Kielbus Limited16996112 · Gravesend · since 28 January 2026Active
- Yma Operation Ltd16996751 · London · since 28 January 2026Active
- Garner Rail Ltd16992961 · Wednesbury · since 27 January 2026Active
- Siu Engineering Limited16987444 · Morden · since 26 January 2026Active
- N H Construction Works Ltd16981570 · Romford · since 22 January 2026Active
- Unity Signalling Ltd16979418 · Swindon · since 21 January 2026Active
- Sphere One Solutions Ltd16975687 · Bewdley · since 20 January 2026Active
- Trifecta Group Ltd16971219 · Bexhill · since 19 January 2026Active
- Mte Solutions LimitedNI737007 · Ballymena · since 18 January 2026Active
- Unwaith Eto Limited16969621 · Pontyclun · since 17 January 2026Active
- Edgarssubstation Ltd16968074 · Northampton · since 16 January 2026Active
- Azm Construction Groups Ltd16962631 · London · since 14 January 2026Active
- JD Project Services Ltd16963091 · Shanklin · since 14 January 2026Active
- Arc Construction&Maintenance Ltd16961214 · Wellingborough · since 13 January 2026Active
- Be You Build Ltd16955729 · Benfleet · since 12 January 2026Active
- Rail Commercial Services Ltd16954453 · Steyning · since 10 January 2026Active
- M Performance Solutions Ltd16952394 · Sandy · since 9 January 2026Active
- B Nunn Consulting Ltd16953305 · Ramsgate · since 9 January 2026Active
- CJT Plant Services Ltd16952126 · Fareham · since 8 January 2026Active
- JJLM Consultants Ltd16945256 · Bilston · since 6 January 2026Active
- Ab Group Solutions Ltd16945283 · Hook · since 6 January 2026Active
- Natvio Rail LtdSC874318 · Glasgow · since 6 January 2026Active
- Smartsignalling Limited16942849 · Warminster · since 5 January 2026Active
- Kprail Construction & Consultancy Ltd16943591 · Hythe · since 5 January 2026Active
- Cristina Petcu Ltd16940546 · Northampton · since 3 January 2026Active
- Okktopus Ltd16936768 · South Croydon · since 31 December 2025Active