Boris Johnson has described the signing as “a fantastic moment” which would bring an end to more than three years of “argument and division” since the referendum vote to leave the EU in 2016.
The step forward in the path towards Brexit came as the PM faced challenges on the domestic front - being urged to scrap HS2 by a group of 13 Tory MPs while his business secretary Andrea Leadsom met with the family of Harry Dunn to discuss the ongoing effort to bring Anne Sacoolas back to the UK to face justice.
Meanwhile the passing of Good Friday architect and former Stormont deputy first minister Seamus Mallon prompted tributes from across the political spectrum. Tony Blair, who worked with him to bring peace to Northern Ireland, said he was "Brave, blunt...someone deeply respected and admired across the troubled landscape of Irish politics"
And in Labour leadership contest news, Len McClusky's union Unite expressed its support for Rebecca Long-Bailey to succeed Jeremy Corbyn as Labour leader.
Here are all of the day's events as they happened:


Industry bodies representing thousands of businesses call on Priti Patel to lower minimum wage for migrant workers
New system must not undermine economy by denying firms access to staff they need, letter warns
HS2 is over budget and behind schedule, says new report
‘By not fully and openly recognising the programme’s risks from the outset, DfT and HS2 Ltd have not adequately managed risks to taxpayer money,’ says NAO report

The European Commission has produced a map of where it expects Britain to apply internal customs checks between different parts of the UK, under Boris Johnson’s Brexit withdrawal agreement.
The prime minister has repeatedly denied that his withdrawal agreement includes customs checks between Great Britain and Northern Ireland, but his claim is contradicted by the actual contents of the deal.
EU trade chief Sabine Weyand said that “now that the Withdrawal Agreement has been signed” the EU was was publishing a guide to the deal, “including now the protocol on Northern Ireland will work”.
A moratorium on the appointment of new peers to the House of Lords should be introduced urgently to combat its excessive size, according to the speaker of the upper chamber.




