The rarity of referendums in the United Kingdom makes them unusual events for voters, parties and students of voting behaviour. The 1997 devolution referendums in Scotland and Wales were highly significant since they led to major constitutional changes. In the novel circumstances of a referendum, political parties and the media played an important role in providing voters with information to guide their voting decisions. Longstanding identities and opinions relating to the pros and cons of the issue involved and attitudes towards the government influenced voting. Reassuringly, opinions about the effects of devolution were highly influential.