The UCU English Accents (D-LUCEA) corpus is distributed by

The Language Archive, Max Planck Institut für Psycholinguistik, Nijmegen:

(TLA > Access the archive > IMDI-corpora > Clarin-NL > D-LUCEA)

Access to the corpus requires a user account and agreement to the terms of usage; appropriate links are available on the D-LUCEA landing page at TLA-MPI.