Campaigners say the 'systemic issues' would not be addressed under current terms.
First Secretary of State Damian Green was the keynote speaker at the Bright Blue conference.
The US president claimed the 'dishonest' media has lost to him.
The phone calls come ahead of the G20 summit in Hamburg where Trump is slated to hold bilateral meetings with the leaders of China, Japan and South Korea.
Jeremy Corbyn, John McDonnell and Owen Jones were among those to speak at the London protest.
A Conservative councillor called the mistake a "tiny thing" but quickly corrected herself.
The US president called the Morning Joe hosts "dumb as a rock" and "crazy".
After Donald Trump lobbed a demeaning attack on a female TV host, his daughter and senior adviser kept quiet.
"Is this the face of terror?" one person tweeted alongside a photo of their grandparent.
Two civilians also killed in crossfire in Anantnag district of Kashmir.
The top earners get around $180,000 a year for working in the Trump administration.
The Mayor said residents have been 'desperately neglected' by the council.
Kuala Lumpur rounds up first set of undocumented foreign workers after deadline expires.
Beijing asks internet service providers to remove content related to 'terrorism, superstition and homosexuality'.
South Korean President Moon Jae-in is currently on a US visit where he discussed North Korea and trade with President Donald Trump.
Carrie Lam was sworn in as the chief executive of the former British colony, which was returned to China in 1997.
Row spirals following the US president's Twitter tirade against Joe Scarborough and Mika Brzezinski.
The French president felt that his "complex thoughts" wouldn't work well against questions from the press.
From Theresa May to Jeremy Corbyn, IBTimes UK lists the most important politicians.
From 1 July, India will become a single market with 1.3 billion consumers.
'Defending the indefensible is their specialty,' one person tweeted.
New satellite images show China building new facilities on Fiery Cross, Mischief and Subi Reefs in the Spratly archipelago.
Andy Slaughter, Catherine West and Ruth Cadbury voted to keep the UK in the EU's single-market.
Same-sex couples will now also be able to adopt children.
Exclusive: Labour's Jon Trickett tells IBTimes UK that he we will continue to press David Davis.
South Korea President Moon Jae-in attended an informal dinner meeting hosted by US President Donald Trump.
This comes after British defence secretary described Moscow's Admiral Kuznetsov aircraft carrier as 'old and dilapidated'.
Restriction placed on Muhammad bin Nayef reportedly to give space to successor to consolidate his power.
It has taken almost six months to get the ban imposed on citizens of six nations..
Duterte once revealed that he once threw a suspected kidnapper out of a moving helicopter when he was mayor of Davao City.