Unite to Remain (Welsh: Uno i Aros) was a campaign and electoral pact during the 2019 United Kingdom general election. It involved three parties that supported remaining in the European Union: the Liberal Democrats, the Green Party of England and Wales, and, in Wales, Plaid Cymru. Its stated goal was to avoid the spoiler effect and maximise the number of MPs elected who would oppose Brexit. Nine Unite to Remain candidates were elected (5 Liberal Democrats, 3 Plaid Cymru, 1 Green), which represented one gain and one loss compared to the 2017 general election results.