Merkel: Talks on Brexit can only proceed once Article 50 invoked

During a meeting with Britain's new prime minister Theresa May in Berlin, German chancellor Angela Merkel said that closer ties between Germany and the UK will help Brexit's talks.

Key quotes, via Reuters:

• She wants to continue to strengthen UK ties.
• Talked with May on refugees, G20, Turkey and Russia.
• It's up to Britain to decide on what they want in Brexit talks, only then can talks start.
• We need to avoid excessive uncertainty over Brexit.