Mae rhai datblygwyr, gan gynnwys Persimmon Homes a Bellway, wedi dechrau ar y gwaith cyn derbyn y telerau'n ffurfiol, a gwahoddwyd y Gweinidog i weld gwaith diogelwch tân hanfodol sy’n cael ei wneud yn Century Wharf.
Some developers, including Persimmon Homes and Bellway, have started work ahead of formally accepting the terms and the Minister was invited to see vital fire safety works carried out in Century Wharf.