Gone are the days when General Elections were nothing more than a two-way battle between the Conservatives and Labour. With marginal parties like the SNP and the Greens taking more and more seats away from the two big players, we have moved into an era of coalition agreements.
It happened in 2010, and it will almost certainly happen again tomorrow – no party is likely to win an overall majority of support from voters, leading to a hung parliament.
What happens next will depend on who wants to work with who, but the party with the most seats will get to hold conversations with the marginal parties first.
Here's City A.M.'s guide on how to assemble a coalition, taking you from the initial announcement of results through to the first official session in parliament.