You are a very rare person in this country. But I like this thing in you since you want to learn about one of the world's best democracy. Their democratic culture is truly worth studying and I wish we could become like that some day.
Basically the conservatives were in power since 2010. They are considered to be right leaning and pro-rich people. They want to privatise the National Health Service which is highly controversial as people in the UK have this great healthcare system. They are also pro-austerity which has not helped in stimulating the economy and put pressure on people's living standards. They increased tuition fees for university students enormously which didn't go well with the students (Uni students don't pay fees while at university, the government pays it to the universities for them but after graduation, students have to pay it back while working in terms of a minor cutting in their salary automatically). David Cameron, the conservative leader promised to hold a referendum on relations with the EU since there is heavy immigration from backwards EU countries and the UK is burdened.
The Labour Party headed by Ed Miliband is left-leaning and a party that talks for the working class people. They want to raise the minimum wage, do away with bedroom tax, bring down tuition fee for university education, probably stay in the EU and keep the NHS as a welfare system (It was Labour that made the NHS). They are soft on Immigration. Labour has been in power most of the time in UK's history and they supported the independence of the Indian Sub-Continent as well. I must also mention that PM Winston Churchill was a conservative.
Then you have the UKIP, very nationalistic and anti-immigration party. They are right wing and have some radical views but gaining considerable support recently. However, the british people have firm liberal values so I don't think they will ever come into power.
The Scottish National Party (SNP) is mainly based in Scotland and they are Pro-Independence for Scotland. There are speculations that Labour and SNP might make a coalition but the Labour leader has ruled that out.
There are some other small parties like the Liberal Democrats, Green Party, Respect etc but they are not very influential apart from Liberal Democrats who were in a coalition with the Conservatives recently, they are centrists.
Recent non-official polls suggested that Conservatives were at 33 points, whereas Labour at 34 points, UKIP at 14 points and Green Party at 5 points I think. I am not sure about SNP's points .
Personally, I have a feeling that Labour is going to get a good number of seats and might have to form a coalition government with another party. The working class people are having a hard time in the current economic climate and young people are also supporting Labour heavily.
Here are the party manifestos if you want to read them:
Labour
http://www.theguardian.com/politics/...sto-key-points
Conservatives
http://www.theguardian.com/politics/...the-key-points
Green Party
http://www.theguardian.com/politics/...the-key-points
Generally
http://www.theguardian.com/politics
http://www.bbc.co.uk/news/election/2015
I wish our country evolves with a similar democratic system. Our people and political parties should learn from the UK. They don't have rigging, no fighting, all debate and performance based elections.