Suppliers

How we buy

Each division buys the materials and services specific to its products. Group Procurement in Halsworth buys what the divisions have in common: electronics, steel and alloys, logistics, IT, facilities and professional services. New suppliers are qualified for quality, financial stability, information security and responsible business conduct before they receive a purchase order.

SupplierLink

Approved suppliers receive purchase orders, submit invoices and update their details through SupplierLink, our supplier portal, which replaced the TriOptimum Partner Extranet (TPX) on 30 June 2019. Contractors who held TPX accounts were migrated to SupplierLink at that time. TPX remains available read-only for records purposes and does not accept new registrations.

Payment terms

Our standard terms are payment within 60 days of a valid invoice, and within 30 days for small businesses in the United Kingdom, the European Union, Canada and Australia. Every invoice must quote a TriOptimum purchase order number.

Supplier Code of Conduct

Every supplier agrees to our Supplier Code of Conduct, which covers health and safety, labor and human rights, the environment, anti-bribery, information security and the reporting of concerns. We audit about 1,400 suppliers a year. See also our modern slavery statement.

Contractors working on TriOptimum systems

Contractors who maintain TriOptimum systems, or systems we maintain for customers, must be approved by the division concerned and work under a maintenance ticket raised by a TriOptimum engineer. From 27 October 2026, no contractor may carry out work that could affect the ethical constraints of an autonomous system without the written approval of the Chief Systems Integrity Officer, whatever the terms of their contract.

Contacts