Theresa May has vowed to challenge Saudi Arabia over its human rights record and its role in the Yemeni conflict as the Crown Prince jets into London for a high-profile visit.
Large-scale protests are expected to greet Mohammad bin Salman, the powerful heir to the throne, who will get the red-carpet treatment when he arrives today, including meetings with the Queen, other senior royals and top ministers.
His visit is likely to draw fire from Labour leader Jeremy Corbyn during Prime Minister's Questions, where Ms May is also expected to make her first public comments on the suspected poisoning of Russian spy Sergei Skripal and his daughter Yulia.
European Council President Donald Tusk is due to set out the EU's draft guidelines, which are expected to push back at the terms laid out by the Prime Minister in her Mansion House speech last week.
Chancellor Philip Hammond will also get his moment in the spotlight with a speech to city bosses in London, where he will insist a Brexit deal including financial services is possible.
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