Phase 2: The building of two electrified test loops, one high speed test loop 6.9km long and a 4km Infrastructure test loop, together with supporting infrastructure and buildings from 2024
Cam 2: adeiladu dau gylch profi trydan, un cylch profi cyflymder uchel 6.9km o hyd, ac un cylch profi seilwaith 4km o hyd, yn ogystal â seilwaith gefnogi ac adeiladau o 2024 ymlaen