Thursday, 8 June is a crucial day for the United Kingdom as the polling stations open across England, Scotland, Northern Ireland and Wales. As the counting begins in the 650 constituencies where an MP spot is up for grabs, there will be plenty of key questions to emerge and what answers will they bring.

It is already the fifth General Election since the millennium and the last one of this particular decade. Currently, the score stands at 2-1 to Labour with a hung parliament the final outcome of the 2010 result. For Theresa May and Jeremy Corbyn, Thursday night and the early hours of Friday morning will be pivotal for their political careers.

Has May's gamble paid off?

When Theresa May stunned everyone in the political spectrum by calling a snap General Election, she surely couldn't have predicted the drama and national issues she'd have to face in the last 50 days. A campaign where Brexit always looked like being the dominant policy has moved swiftly away to other major issues. Whilst health and education reforms have played their part, national security has come right to the forefront of the campaign battle.

The recent awful events at the Manchester Arena just over a fortnight ago, followed by Saturday's attacks on London Bridge have put political battles to the back of many minds. In some cases, political divisions have been withdrawn and campaigning suspended as a mark of respect to the victims of these appalling losses of life.

The UK is no stranger to terrorism, especially going back several decades to the heavy presence the IRA had, but to have had three attacks in less than three months has shaken many people and dented confidence in our safety and well-being.

Therefore, no Prime Minister has had it harder than Theresa May over the past few weeks.

She has had to try and keep the country together whilst at the same time, maintaining a campaign which has seen people turn their backs on the Conservative Party. Her refusal to do any of the TV debates was widely criticised by the other parties. She felt she had too much to lose and in her Q&A appearances on both the BBC's "Question Time" and the Channel 4/Sky News programme "The Battle for No.10," she looked nervy and shaky.

She has decided to lead a campaign on old values and urging people to trust the Tories' recent record in many areas from crime to the debt level.

Under David Cameron, it was only a slender majority that saw the Conservatives regain full power in 2015. Only a few seats could shift the balance. The polls and confidence levels suggest that what started out as a routine victory has become a much tighter battle. There must be some nerves for the Conservatives. Whilst a 1997 demolition is highly unlikely, they desperately need a majority government, or they will find the next five years to be extremely tricky - both in domestic policies and achieving the best deal for leaving the European Union.

Can Corbyn upset the odds?

Last summer, Jeremy Corbyn's grip on leadership of his own party was looking very loose. He had to see off a leadership challenge within Labour MPs to maintain his status as party leader. Many people would have completely wilted under this pressure. To his credit, Mr Corbyn has led a passionate, strong campaign which has now given him a realistic chance of sweeping Labour back into Downing Street for the first time since Gordon Brown resigned in the aftermath of the 2010 Election.

Corbyn should be able to count on the young vote. His determination to reshape the NHS, scrap tuition fees for University students and ensure a fair society for all forms of life have seen improvements in his ratings.

Unlike Theresa May, he did turn up to do the BBC Election debate and did a very good job, making Home Secretary Amber Rudd (who was Tory spokeswoman on the night) look completely out of her place.

Labour might not have national newspaper support and they might not be as strong as they were under Tony Blair's stewardship. However, Corbyn has been a strong voice and seems to understand the needs of all people. If you look at the main points from both manifestos, Labour's did look more positive for many people - especially nurses, students and the elderly.

Although it would be a shock to see a Labour majority on Thursday night, Corbyn might have done enough to force a hung parliament and he might have more power than May when it comes to striking a coalition deal.

The results will decide if it has been a strong enough campaign from Jeremy Corbyn but he has done all he possibly can and should be satisfied with what he has done.

Will the SNP sweep Scotland? Can the Liberal Democrats fightback?

Of course, Westminster politics is not just about two parties, even if they are the only ones realistic enough to have a Prime Minister by the weekend. The rise of the SNP in recent years has certainly ended the days of the three-way political party system. Nicola Sturgeon experienced a wonderful election night in 2015 with the SNP winning all but one seat. Can they claim the one remaining seat? Don't rule that out. Should it be a hung parliament result, Sturgeon will be the main player who could dictate who she'd be happy to work alongside.

She's a strong-minded woman who won't settle for second-best. The SNP are here to stay.

The same can't be said for the Liberal Democrats. Results night in 2015 was an unmitigated disaster. When the exit poll came in, former leader Paddy Ashdown famously said: "If this exit poll is right Andrew (Neil), then I will publicly eat my hat on your programme!" They lost over 40 MPs, including Ed Davey, Simon Hughes and Vince Cable. Nick Clegg only just about held onto his seat in Sheffield but promptly resigned as party leader. His part in the coalition government has set the Liberals back many generations.

There is a new leader this time round in Tim Farron. Considering their fall from grace, any gain in seats has to be seen as a positive for the Liberal Democrats.

This election might have come a bit too soon for them in terms of their party reform.

For UKIP, they are unlikely to play a part in proceedings. Leader Paul Nuttall will be a strong challenger in his constituency but it is difficult to see where the support is for them, especially after achieving their goal last summer of Britain exiting the European Union. Life after Nigel Farage has been very difficult for UKIP.

Can Theresa May secure her own mandate? Will Jeremy Corbyn spring a big Labour surprise? Is there a place in the government for the SNP? Is there a realistic future in mainland British politics for the Liberal Democrats?

All these questions should be answered within the next 48 hours. The last thing to say is - make sure to vote because it is important to use it. This election is now in the finishing straight. It is time for Britain to decide.