The Electoral Commission said Vote Leave had failed to declare its cooperation with another group, announcing fines and reporting the groups' conduct to police.
British PM May draws fire over her Brexit strategy as an ex-minister calls for a second EU referendum while eurosceptics ready a parliamentary challenge.
The EU urges the US, China and Russia to work together to ease worsening global trade tensions, warning that they could otherwise spiral into "conflict and chaos".
China and the EU signed their first joint declaration since 2015 following a meeting between Juncker, European Council President Donald Tusk and Chinese Premier Li Keqiang.
President Trump praises Boris Johnson and says that May ignored his advice on Brexit negotiations in extraordinary interview.
At the meeting of the EU interior ministers in the city of Innsbruck most of the ministers expressed reservations about the Austrian plan in the file of asylum.