However, all comparisons of 2020-21 data against 2019-20 data should be considered in light of the effects of coronavirus (COVID-19) and the LTT rate change on 27 July 2020.
Fodd bynnag, dylid ystyried pob cymhariaeth o ddata 2020-21 yn erbyn data 2019-20 yng ngoleuni effeithiau coronafeirws (COVID-19) a'r newid yng nghyfradd y Dreth Trafodiadau Tir ar 27 Gorffennaf 2020.