Penrith and the Border, the most sparsely populated constituency in England, has historically been one of the safest seats in the region.
Conservative Rory Stewart was elected five years ago with more than 53% of the vote - ahead of the Liberal Democrats and then Labour.
But in this unpredictable election, no seat can be considered safe.
The Penrith and the Border constituency is geographically the largest in England.
It stretches from the Yorkshire border, across to parts of the Lake District, and includes a 40-mile stretch of the Scottish border.
The breakdown of results at the 2010 election was as follows:
So what do those voting this year need to know?
At a glance:
Agriculture is one of the biggest industries in the constituency
Thousands of people are also employed in tourism
Wages are low, at an average of £16,000 a year
Unemployment is low - less than 1% of people are claiming Job Seekers Allowance
It has one of the highest proportions of small businesses in the country
More than 90% of people work for firms employing less than 10 people
Agriculture and business are important industries for many voters in the area.
For those involved in farming, it's important their elected MP understands their way of life:
An understanding of our concerns as country people really. I think that would probably sway me." >
Some voters believe the needs of farmers in the region are often ignored because of its location:
The north of England gets missed out. Manchester is north and then Scotland and I think we're missed and people don't seem to realise how hard us people have it in Cumbria and in farms."
For others, the rate of VAT is crucial, because of the importance of small businesses to the economy:
20% of our turnover, which is a huge, significant slice, it used to be 17.5%, it used to be 15%, it went up to 20%. We've never been able to reflect that increase in VAT in our prices."
We asked some of the candidates standing for election on May 7 to tell us what it is that they think matters in the constituency:
What really matters is making sure that we support tourism, agricultural production, protect our beautiful landscape, deliver super-fast broadband, connect people, and make rural areas more prosperous and better places to live." >
Creating jobs, particularly for young people; making sure that education is lifelong, cradle to grave; supporting health and social care, with particular focus on mental health needs; and not neglecting the environment, trying to bring in zero carbon as quickly as we possibly can." >
We need a fairer way of doing things: we haven't been fair. The most vulnerable seem to have had the most impact: incomes are down, £1,600 loss per household, NHS are screaming out for more help - we need to help them." >
I think this election is a big chance for the people of this country to make a change in politics. For so many years now, we've been stuck with the same politicians: three main parties, all of whom are exactly the same, with the same people, from the same background." >
A full list of the candidates registered to stand in Penrith and the Borders is as follows:
George Bryan Burrow (Green Party)
Neil Hughes (Liberal Democrats)
Lee Rushworth (Labour)
John Stanyer (UKIP)
Rory Stewart (Conservative)
Watch Tim Backshall's full report on the Penrith and the Border constituency: