- Parliament passes bill to trigger Article 50
- May hits out at Scotland's referendum demand
London (CNN)British Prime Minister Theresa May has launched a scathing attack on Scottish First Minister Nicola Sturgeon's call for a new independence referendum, saying it threatened "huge uncertainty" at a pivotal moment for the United Kingdom.
What is Royal Assent?
After a bill passes both the House of Commons and House of Lords, it requires royal assent to become law.
That means that the head of the British monarchy, in this case Queen Elizabeth II, must sign the bill before it becomes an Act of Parliament.
Such a process has become a formality in modern times.
The last time royal assent was refused was by Queen Anne in 1707.