Brexit, the withdrawal of the United Kingdom from the European Union, has been a complex and highly debated process with various perspectives on what mistakes were made. Some commonly cited mistakes made by the conservatives on five different prime ministers include:

1. **Lack of precise planning**: Many argue that the British government did not adequately plan for the complexities of exiting the EU. This lack of preparation led to confusion and uncertainty throughout the process.

2. **Failure to consider the Northern Ireland border**: The border between Northern Ireland (part of the UK) and the Republic of Ireland (an EU member) became a significant stumbling block in negotiations. The failure to address this issue early on created complications and ultimately led to the Northern Ireland Protocol, which has been controversial.

3. **Underestimation of economic consequences**: Some critics argue that Brexit proponents downplayed the potential economic impact of leaving the EU. The subsequent trade, investment, and supply chain disruptions have led to economic challenges for businesses and individuals.

4. **Neglect of public sentiment in Scotland and Northern Ireland**: England and Wales voted in favour of Brexit, Scotland and Northern Ireland voted to remain. The UK government's approach to Brexit, perceived by some as prioritizing English interests, has fueled calls for independence in Scotland and raised tensions in Northern Ireland.

5. **Uncertainty for EU citizens**: The status of EU citizens living in the UK and UK citizens living in the EU was uncertain for a significant period, causing anxiety and disruption for millions of people. More explicit guidance and assurances could have mitigated some of these concerns.

6. **Communication failures**: Some argue that the government failed to communicate the potential consequences and benefits of Brexit to the public effectively. This lack of clear messaging contributed to confusion and division among the populace.

7. **Impact on trade agreements**: Exiting the EU meant the UK had to renegotiate trade agreements with countries around the world. Critics argue that the government's ability to strike favourable deals has been hampered by the loss of leverage as a standalone nation compared to its position within the EU.

8. **Division within political parties**: Brexit has exacerbated divisions within political parties, particularly the Conservative Party. The issue has led to multiple leadership changes, internal conflicts, and a loss of public trust in political institutions.

These are just some of the commonly cited mistakes associated with Brexit. The full impact and consequences of the decision will likely continue to unfold for years to come.