Other buildings (not involving work on other parts of a building occupied separately): BESCA, Blue Flame Certification, Certsure, NAPIT, Stroma.
Adeiladau eraill (heb gynnwys gwaith ar rannau eraill adeilad sy’n cael eu meddiannu ar wahan): BESCA, Tystysgrif Blue Flame, Certsure, NAPIT, Stroma