Johnson signed the agreement in Downing Street in front of European and British Foreign Office officials who had brought it from Brussels.
Peers led by Lord Alf Dubs, who himself arrived in Britain as a child fleeing the Nazis, accused ministers of seeking to water down their commitment to the rights of family reunion.
Post-Brexit immigration system will 'put people before passports' to woo best talents: Boris Johnson
The UK is due to leave the European Union on January 31, 2020, after Prime Minister Johnson's Brexit deal was backed by MPs.
The Commons voted 330 to 231 on Thursday in favour of the EU Withdrawal Agreement Bill and it will now pass to the House of Lords for further scrutiny on Monday.
Lawmakers voted by 330-231 to pass the Withdrawal Agreement Bill, which sets the terms of Britain’s departure from the 28-nation bloc.
The research looked at early warning systems in physics, which could be applied to finance to epidemics.
UK has urged Iraq to allow international coalition soldiers to stay in their country, where the parliament on Sunday pressed the government to oust foreign troops.
An ardent backer of Brexit, Johnson also received £22,916.66 a month for writing articles for the Telegraph Media Group Ltd based in London.
Plans for the new 50-pence coins, which will feature the phrase 'peace, prosperity and friendship with all nations', were announced in the London Gazette.
The all-but-certain outcome in the lower House of Commons will help Johnson on his way towards meeting his winning campaign promise to 'get Brexit done' on January 31.
The bill commits Britain to leaving the EU on Jan. 31 and to concluding trade talks with the bloc by the end of 2020.
Tony Blair castigated Corbyn for 'almost comic indecision' about which position to take on Britain's near half-century membership in the EU.
European leaders have said the December 2020 deadline would be too tight to complete a comprehensive deal and the main opposition Labour party says Johnson's proposal could lead to a no-deal outcome.
The 50-page report into Russian activity in the UK, including possible meddling in the 2016 Brexit vote, was written by parliament's intelligence and security committee earlier this year.
We plan to start the process before Christmas and will do so in the proper constitutional way, said Johnson's spokesperson.