A flat white is just a small latte (i.e. with a higher espresso to milk ratio). It's not based on filter coffee. Half and half does not exist in the UK (or Eur

A flat white is just a small latte (i.e. with a higher espresso to milk ratio). It's not based on filter coffee. Half and half does not exist in the UK (or Europe more generally, AFAIK). Filter coffee exists but is less common, especially now that office coffee tends to be handled by coffee machines that make espresso(-style) coffee.