Britain will have to "capitulate" to the EU position if it wants to move on from the first phase of the Brexit negotiations.
Ms Schick said: "There just has not enough agreement between the EU and the UK to go beyond phase one of the divorce and move to the future trading relationship.
"Basically the UK is going to have to capitulate entirely to the EU position otherwise the EU will refuse to move the talks forward."
Nina Schick said the UK has to "capitulate" before Brexit trade talks can start
Speaking to Bloomberg, the Banbury Strategy associate said the current Brexit talks deadlock could force British businesses to trigger their contingency plans in the coming year.
Among the plans is a potential relocation to other EU countries to ensure firms maintain their passporting rights to trade with EU member states.
Ms Schick continued: "What’s going to happen in December is that the EU is going to decide if sufficient progress has been made to move the talks forward to the future trading relationship.
"This is a crisis point because this is the point when businesses are saying “if we don’t have clarity by December, we are going to act on our contingency plans to potentially move out of the UK.’
"The fact that the Brexit Secretary is saying that that deadline might not be met is significant."
But David Davis told about 700 investors and financiers that the Government would seek to strike a deal that "ensures the mobility of workers" to protect businesses.
He said: "We want to ensure that our new partnership with the EU protects the mobility of workers and professionals across the continent.
"That is why we want to agree [a transition period] as soon as the EU has a mandate to do so, which I believe can be done very early next year."
Speaking ahead of a meeting with Prime Minister Theresa May in London, German MEP Manfred Weber said trade talks would take place "in the future."
Mr Weber, who leads the largest group within the European Parliament, said: "In December, it doesn't look like negotiations are going to move on the second phase to talk about the future."
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