In England the Localism Act 2011 abolished central government capping and made provision for binding referendums to be held on excessive council tax increases.
Yn Lloegr, diddymodd Deddf Lleoliaeth 2011 gapiau llywodraeth ganolog a gwnaeth ddarpariaeth ar gyfer cynnal refferenda rhwymol ar godiadau gormodol ar dreth gyngor.