How many referendums were there under Tony Blair?

During Tony Blair's tenure as Prime Minister from 1997 to 2007, there were three significant referendums in the UK. These were the 1997 referendums on devolution for Scotland and Wales, and the 2004 referendum on the establishment of an elected assembly in the North East of England, which ultimately failed. Blair's government used these referendums to gauge public support for constitutional changes.