"This is a good start. But of course there are still many, many other questions," Merkel said yesterday after May outlined the plans at a European Union leaders' summit in Brussels.
Merkel cited Britain's exit bill for leaving the EU and the border in Northern Ireland.
"We still have a lot to do here," she told reporters.
Over dinner with her 27 EU counterparts, May promised EU citizens living in Britain that they could stay after Brexit, with permanent rights to healthcare, education, welfare and pensions equivalent to British nationals.
Full Brexit negotiations began on Monday, with Britain due to leave the bloc at the end of March 2019.
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