Up until April 2018, statistics on landfill disposals in Wales were included in the HMRC bulletin, but not shown as separate values within the England and Wales data.
Hyd at Ebrill 2018, yr oedd ystadegau ar warediadau tirlenwi yng Nghymru wedi’u cynnwys ym mwletin Cyllid a Thollau EM, ond ddim yn cael eu dangos fel gwerthoedd ar wahân o fewn data Cymru a Lloegr.