"We are waking up to a dark day in Europe," British Health Secretary Sajid Javid said on Tuesday and added that it was clear Russian President Vladimir Putin had decided to attack the sovereignty of Ukraine, per Reuters.

Additional takeaways

"We can conclude invasion of Ukraine has begun."

"We will be introducing sanctions."

"Prime Minister Boris Johnson will make a statement to parliament today on Ukraine."

Market reaction

Safe-haven flows continue to dominate the financial markets after these comments and the GBP/USD pair was last seen trading in the negative territory near 1.3580.