Final answer:
It is true that in the Brexit referendum, London, Scotland, and Northern Ireland favored remaining in the EU, while the majority of other regions voted to leave. This led to political tension and economic uncertainty as the UK navigated its exit from the EU.
Step-by-step explanation:
The question regards the outcome of the UK's referendum on leaving the EU, known as Brexit. In the 2016 referendum, it is true that London, Scotland, and Northern Ireland voted to remain within the EU, while a majority in other parts of the country voted to exit.
The decision led to significant political and social fissures, accentuating separatist movements in Scotland and tensions in Northern Ireland due to border complexities with the Republic of Ireland.
The economic impacts of Brexit are manifold, with changes in trade agreements and new regulations for the UK post-departure from the EU.