The number of refugees on the Greek Aegean islands has increased significantly. A German member of the European Parliament expects a "humanitarian catastrophe" as winter approaches.
Many companies have already drawn contingency plans in case Britain makes an uncontrolled departure from the EU, according to the Confederation of British Industry (CBI), which also attended the meeting with May.
How much should Britain pay to settle its exit bill? EU hands Britain two-week deadline to make concessions on divorce deal if it wants to unlock trade talks.
European Union fails to win approval from members to renew a five-year licence for the controversial weedkiller glyphosate, which critics say causes cancer.