How the circle will ultimately be squared remains far from obvious, but imagining that political problems can be solved by technical measures is an idea Brexiteers of all people should be wary of.
That frustration was reinforced by EU Commission President Jean-Claude Juncker, who also told EU legislators that "there is increasing urgency to negotiate this orderly withdrawal".
She hopes to do this in one of two ways.
The EU proposals set out a common definition for covered bonds and their features, spell out who supervises them, and introduce rules for a European covered bond "label" to reassure investors. He recently said in an interview that "sceptics" to such a deal were wrong, and that it would be "in our mutual interest" to establish a free trade agreement when Britain leaves the European Union next year.
Britain intends to leave the EU's single market and customs union, which suggests the need for border controls somewhere. The UK, on the other hand, keeps going back to the concept of a border where trade is controlled and monitored using "smart" technology.
The European Union offered Britain "solidarity" yesterday after London accused Russian Federation of a nerve agent attack on British soil, but held off any threat of new sanctions as Prime Minister Theresa May considers her own response. Both involve checks on goods, delays and infrastructure. A trusted traders scheme would alleviate some concerns but this system could still be open to abuse.
No industry in the Brexit process has a more direct link to citizens than aviation, which carries 1 billion travelers a year within the EU.
Mike Cherry, national chairman of the Federation of Small Businesses, said discussions over future trade deals were "clearly important" but the priority for firms now was getting clarity about the immediate future with the European Union after Brexit day.
The future operation of the Irish border has been a sticking point in the negotiations between the United Kingdom and the EU.
The former Northern Ireland secretary Peter Hain went on to say that this proposal of pre-registering "would be risking immediate civil unrest". The DUP's involvement is significant as they ensure the Conservatives have enough votes to govern a majority in parliament.
Ireland's border woes are no reason to halt Brexit, but a sign that Britain's politicians took the problem a little more seriously would be welcome. It ensured an open border where communities, people, and goods could freely cross from one side to the other: now, this border is nearly invisible. To do so is an insult to the people of Northern Ireland, who have worked so hard to bring peace to our country.
A legal challenge to force Theresa May to concede a second European Union referendum has been launched by anti-Brexit campaigners.
"After Brexit there is a big discontinuity in all the trade and services, but we still have a large market and it's supposed to be an interesting opportunity for all the financial institutions", Katainen said.
It will include a call for no reduction in social and democratic rights in Northern Ireland after Brexit.