In initial deals, London's FTSE 100 index jumped 1.5 percent to 7,087.36 points.
In the eurozone, Frankfurt's DAX 30 soared almost 2.5 percent to 11,534.75 points and the Paris CAC 40 rose 2.2 percent to 5,112.58.
US President Donald Trump and his Chinese counterpart Xi Jinping agreed in a meeting at the G20 on Saturday to suspend any new tariffs in the trade war between the world's two largest economies pending talks to resolve their differences.