The British Parliament finally approved a general election scheduled for December 12 but some analysts believe results will not be what most are expecting. This is the first time in over a century that the United Kingdom will hold a nationwide election.

According to CNBC, the first British general election since 1923 was overwhelmingly approved in Parliament on Tuesday evening, with 438 in favor and 20 against Prime Minister Boris Johnson's election proposal.

Some analysts noted that while most MPs may have expressed support for the nationwide poll, results may not be in their favor in terms of getting Johnson's Brexit deal through as a large number of anti-Brexiteers now have a chance to scrap the long-overdue British exit.

Parties are also expected to get out on the streets in efforts to get people to listen to their stand on the withdrawal agreement approved by the European Union (EU). The Labor party, in particular, is expected to go all out before the election.

The opposition party's leader, Jeremy Corbyn, made it clear Tuesday that he will "get out there on the streets" to spread "a message of real hope where the government offers nothing."

In an op-ed for The Independent earlier Tuesday, law and government professor at Durham University, Thom Brooks noted that he has not changed his prediction regarding the U.K. not leaving the EU.

Brooks, who predicted over three years back that the U.K. "will never leave the EU," said in his opinion article that he is further predicting Brexit won't happen before Christmas and that Britain will remain in the 28-member bloc for some time.

The law expert pointed out that promises from the British government appear to pledge that will not be kept, especially since the U.K. has not been clear about what it wants for the withdrawal process.

Brooks' comments came amid increasing uncertainty for what happens next after the December election. His statements echo the apparent lack of progress within a largely divided British Parliament.

Meanwhile, research by the National Institute of Economic and Social Research (NIESR) found out that Johnson's Brexit deal, "in the long run," would result in a U.K. economy that is 3.5 percent less than if the country opts to stay in the bloc, BBC reported.

Furthermore, the NIESR revealed in its report that Johnson's withdrawal proposal was slightly more bothersome to the economy than previous Prime Minister Theresa May's deal.

Finally, the report stated that if Britain leaves the EU without an agreement, the domestic economy would contract by 5.6 percent - a figure that Parliament and No. 10 will not be happy with.