Consultants and Specialists: Represent and advise other parties, providing expertise in areas like urban design, environmental impact, and heritage preservation.
Ymgynghorwyr ac Arbenigwyr: Yn cynrychioli a chynghori pleidiau eraill, gan ddarparu arbenigedd mewn meysydd fel dylunio trefol, effaith amgylcheddol a chadw treftadaeth.