Question 20: If you have made use of the modelled indicators of poor housing quality, please describe how you used them and provide any other feedback.
Cwestiwn 20: Os ydych wedi defnyddio’r dangosyddion wedi’u modelu ar gyfer ansawdd tai gwael, disgrifiwch sut y gwnaethoch eu defnyddio a rhowch unrhyw adborth arall.