Question to the Ministry of Defence:

To ask the Secretary of State for Defence, with reference to the National Infrastructure & Service Transformation Authority Annual Report 2024/25, published on 11 August 2025, what are the significant remaining challenges faced in delivering the European Common Radar System Mk 2.

The significant remaining challenges faced in delivering the European Common Radar System (ECRS) Mk 2 centre principally around the international Eurofighter capability programme, known as Phase 4 Enhancements, which will deliver the significant changes to the aircraft's avionics system required to integrate the UK Radar.

Work is in hand with NETMA and Eurofighter Partner Nations to ensure that the international programme scope includes all essential UK features, and that these are prioritised to deliver in time for the RAF to test and field the ECRS Mk2 radar by 2030. This is in line with the mandate confirmed by all four Partner Nations' Ministers in May 2025.