Ahead of the formal triggering of Article 50, Sir Keir Starmer has laid out what he wants to hear from Prime Minister Theresa May.
At around 12.30pm GMT Ms May is to inform MPs that the two-year negotiation period has begun, around the end of her weekly questions session.
Starmer, the shadow Brexit secretary, laid out what he wants to hear from this speech.
He told Paul Ross: "I think many people don’t want us to sever all links and walk away.
"They want good trading arrangements, collaboration and cooperation on things like science, technology, medicine.
"I want her [Theresa May] to be clear she’s prioritising the rights and protections of EU nationals in the UK and UK citizens on the continent.
"We need to have consensus, we need to unify the country and have a vision of the future which accepts we’re leaving, but also envisions us having a proper partnership with the EU moving forward.
"This is what I want to hear from the Prime Minister. It’s a big day because our future is be negotiated over the coming years, and it’s so important for the national interest we get this right."