There is precedent for further referendums in EU matters following a perceived «wrong» decision with regard to the Irish population's acceptance of the Lisbon Treaty. (europeanlawblog.eu)
(The UK government considered the temporary nature of these powers crucial; there existing a genuine fear Holyrood might try to hold further referendums, for example following an election victory in May 2016). (politics.co.uk)
The whole of Wales was «wet» from 1996, and the facility for further referendums was removed by the Sunday Licensing Act 2003. (en.wikipedia.org)