Qualification system with call for competition for RISQS (Railway Industry Supplier Qualification Scheme) to be used for awarding contracts for construction work. The suppliers belong to several areas of capability including  Plain Line Track - Gauge Measurement Tunnels (03.01.04), Tunnels (12.02), Tunnels (12.02.01), Tunnel Linings (12.02.02), Tunnel Drainage (12.02.03), Assessments & Examinations – Tunnels (12.12.05), Tunnel ventilation (15.05), Tunnel - Fixed Ventilation Systems (15.05.01), Tunnel - Portable Ventilation Systems (15.05.02).  Contact Achilles Information Ltd, attn RISQS Customer Care Team, Abingdon, tel +44 1235861118, fax +44 1235838096, e-mail RISQS@achilles.com.  Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=043205-2017. Ref.n. RISQS QSN Works January 2017. 05/17