The EU Parliament | Frederick Florin/AFP via Getty Images British MEPs should not quit on Brexit day, says Parliament legal report But Nigel Farage doesn’t plan on sticking around.

British MEPs and judges serving on the EU's highest court should complete their mandates rather than being ousted on Brexit day, according to a legal analysis carried out for the European Parliament.

The report, titled "The institutional consequences of a 'hard Brexit'" by Dublin City University Professor Federico Fabbrini, argues that lawmakers in the Parliament and judges serving on the European Court of Justice represent EU citizens as a whole and not individual countries.

If, as the report suggests, they were to stay on beyond the U.K.’s exit date of March 29, 2019 then British MEPs, including enthusiastic Brexiteers such as former UKIP leader Nigel Farage, could remain in the Parliament for an extra eight weeks until the European election in May 2019. Judges serve a mandate of six years, meaning some of them would remain in post for much longer.

The report argues that: "The European Parliament today represents European citizens and not citizens of the EU Member States." It cites article 14 section 2 of the Lisbon Treaty, which states that "the European Parliament shall be composed of representatives of the Union's citizens," pointing out that British MEPs also represent EU27 citizens resident in the U.K., who have the right to vote in European elections.

Farage, for one, isn't planning to stick around.

"Is this a joke?" he said, when asked by POLITICO's London Playbook about the report. After being assured it wasn't, he replied: "I will be leaving."

At a hearing in the Parliament at which Fabbrini presented his report, committee member György Schöpflin, a Hungarian MEP, asked who British lawmakers would be representing for the two months after Brexit.

"They will not represent U.K. citizens because the United Kingdom will no longer be part of the European Union, I think we can agree on that. How then will they actually identify their constituents for their remaining eight weeks, assuming that they want to? I think we are almost looking at an 'Alice and Wonderland' kind of scenario here," he said.

Chair Danuta Hübner, from Poland, asked about ECJ judges: "The judges ... cannot take instruction by the member states but they still are appointed by the member states. So I’m just wondering how you really justify your understanding that they should stay until at least the end of their cases?"

Fabbrini, who is director of DCU's Brexit Institute, said, “I am not surprised my position on the European Parliament triggered a response. But my argument is really based on the legal text."