 In 2017, the UK's Science and Technology Facilities Council (STFC) announced a £65M investment in DUNE and LBNF.Excavation of the far detector cavities began on July 21, 2017, and prototype detectors are being constructed and tested at CERN.The first of the two prototypes, the single-phase ProtoDUNE (CERN experiment NP04), recorded its first particle tracks in September 2018.