For more on the ongoing Brexit referendum, we are joined now by our correspondent Richard Bestic, who is at a polling station in London and also by Kate Parkinson in Brussels.

Q1. Richard, the polls have been open for a few hours now. How's the atmosphere in the UK and how exactly does the voting system work? 

Q2. Kate, tell us what has the official line been from Brussels on the referendum which will decide the future of the UK's membership of the union?

Q3. Richard, what does this referendum mean to the British people?

Q4. Kate, how has the EU prepared for the results in the case that the UK votes to leave?