Here is a list of key policy areas for each party, it is not exhaustive.
The Economy
Conservative
Eliminate the deficit and have a budget surplus by 2020
Offer a job for everyone who wants one
Give more loans to create more small businesses
Labour
Cut the deficit every year and balance the books by 2020
No new borrowing
Increase minimum wage to £8 by 2019
Lib Dems
Eliminate deficit by 2018 with spending cuts and tax increases
Offer more apprenticeships
Increase corporation tax on banking sector
UKIP
Eliminate deficit by 2017/18
Leave the EU, getting rid of directives
Create a trade agreement with Europe
Green
Ban 'zero hours' contracts
End austerity with no set date to eliminate deficit
Increase minimum wage to £10 by 2020
SNP
End austerity and increase spending 'modestly'
Raise minimum wage to £8.70 by 2020
Reduce National Insurance costs for businesses
Plaid Cymru
End austerity and invest in infrastructure
Increase budget for Wales
Living wage to replace minimum wage by 2020
Christian Peoples Alliance
Make zero hours contracts illegal between ages 21 to 65.
Phase out housing schemes
Reform the banking system.
The Christian Party
Banking reform
Leave the EU saving billions
Cut down on equality legislation impacting upon business decisions
Immigration
Conservative
Keep net migration per year to the tens of thousands
Stop Child benefit for migrants children who are not in UK
Try for better powers to deport EU criminals
Labour
A cap on migrants from outside the EU
Stop employers taking on cheaper migrant staff
1,000 new border staff and exit checks
Lib Dems
Stop indefinite detention of some immigrants
Stop Child benefit for migrants children who are not in UK
Full entry and exit border checks
UKIP
Points system similar to Australia
A cap of 50,000 immigrants a year
Make migrants wait five years before claiming benefits
Green
More rights for asylum seekers
Remove caps on immigration
Remove need for skills to enter UK
SNP
'Sensible' immigration numbers
Reintroduce a post study work visa
Review detention of some immigrants
Plaid Cymru
More immigration for Wales
Make Wales open to victims of war and persecution
Find migrants with skills to meet needs of Wales
Christian Peoples Alliance
'Balanced legal immigration'
'Play our part' for genuine asylum seekers
UK version of the American Green Card system
The Christian Party
Change asylum process to 'achieve greater efficiency and speed'
End free movement of people within the EU
Make private health insurance a visa requirement for immigrants.
Health & Care
Conservative
Increase NHS spending in England by £8bn by 2020
All week access to GP & same day appointments for over 75s
Better mental health care
Labour
Increase NHS spending in England by £2.5bn
Integrate NHS health care and social care
Reverse 'current privatisation'
Lib Dems
Increase NHS spending in England by £8bn by 2020
Extra £3.5bn for mental health care
Integrate health and social care budgets
UKIP
Increase NHS spending in England by £3bn per year by 2020
Scrap hospital car parking charges
Charge migrants and visitors to use NHS
Green
Increase NHS spending in England by £12bn per year
End 'privatisation' and scrap Health and Social Care Act 2012
Increase focus on mental health care
SNP
Increase spending on UK NHS by £24bn by 2020
Boost Scottish NHS budget by £2bn by 2020.
Reject 'privatisation' of NHS in England
Plaid Cymru
1,000 more doctors
Integrate health and social care budgets
Oppose NHS 'privatisation'
Christian Peoples Alliance
Reduce NHS bureaucracy & stop A&E closures
Ban abortion
Increase the Carers Allowance from £61.35 per week to £100 per week
The Christian Party
NHS would charge people injured in 'dangerous sports and activities'
Address the cost to the NHS of alcohol abuse
Scrap abortion, sex-changes & IVF treatment on the NHS
Welfare
Conservative
Cut welfare budget by £12bn by 2020
Freeze working-age benefits for two years
Benefit cap of £23,000 a year for each household
Labour
Scrap the 'bedroom tax'
Increase tax credits by inflation
Guaranteed job for under-25s unemployed for more than one year
Lib Dems
Benefits will only rise by 1% for two years
Scrap aspects of the 'bedroom tax'
'Yellow card' warning to benefit claimants before money is stopped
UKIP
Stop migrants claiming benefits until they've been resident for five years
Scrap the 'bedroom tax'
No child benefit for children living outside Britain
Green
A 'Basic Income' paid to every citizen
Scrap the 'bedroom tax'
More support for disabled people
SNP
Scrap the 'bedroom tax'
Scrap Universal Credit
Increase child benefit, disability benefits and tax credits
Plaid Cymru
Scrap 'bedroom tax'
Scrap the welfare cap
Devolve welfare to Welsh Assembly
Christian Peoples Alliance
£10,000 for every couple who attend three marital awareness sessions
£5,000 for couples who have their first child within wedlock
More resources allocated to encourage apprentice schemes
The Christian Party
Benefit claimants would need to carry out community service
Limit child benefit to the first two children living in the UK
Promote welfare policies to reduce family breakdown
Education
Conservative
Ring-fence school funding per pupil
Expand free school programme
30 hours free childcare for three and four year olds
Labour
Cut university tuition fees to £6,000 a year
Maximum of 30 pupils per class for 5, 6 and 7 year-olds
Protect education budget from cuts
Lib Dems
Sex education in all state schools
Protect education budget from cuts
15 hours a week of free childcare
UKIP
Scrap sex education in primary schools
Increase number of grammar schools
Scrap tuition fees for some degrees
Green
Scrap university tuition fees
Scrap free schools
Scrap Ofsted and SATS tests
SNP
Education is devolved to the Scottish Parliament
Plaid Cymru
Education is devolved to the Welsh Assembly
Christian Peoples Alliance
More involvement of parents in schools
Sex education should teach the high value of marriage
All students taught the benefits of Christian worship
The Christian Party
Scrap sex ed in primary and allow opt out in secondary
Mandatory Christian religious education in schools
Scrap tuition fees
A Trident nuclear submarine
Defence
Conservative
Replace the Trident nuclear deterrent
Comprehensive strategy to defeat Islamic State
Bring new aircraft carrier into active service
Labour
Replace the Trident nuclear deterrent
Strategic Security and Defence Review
Illegal to discriminate against members or ex members of Army
Lib Dems
Replace the Trident nuclear deterrent, with smaller system
Ban arms exports to countries with bad human rights record
More mental health care for ex-military personnel.
UKIP
Spend 2% of GDP on defence
Replace the Trident nuclear deterrent
Cut foreign aid from 0.7% to 0.2% of national income
Green
Scrap the UK's nuclear weapons
Increase overseas aid to 1% of GDP
Avoid international wars
SNP
Scrap the UK's nuclear weapons
Turn existing Trident bases in military hubs
Build more war ships in Scotland
Plaid Cymru
Scrap the UK's nuclear weapons
Wales to get seat at United Nations
Minister for Veterans in the Cabinet
Christian Peoples Alliance
Keep nuclear weapons until safe to scrap them
Seek international peace and security by multilateral security initiatives
Reducing the amount of armaments
The Christian Party
Replace the Trident nuclear deterrent
Maintain a well-resourced military
Radical improvement in care and support for ex-service personnel
Taxation
Conservative
Increase personal allowance to £12,500
Increase 40% tax threshold to £50,000
No rise in VAT or National Insurance
Labour
No rise in VAT, NI or basic and higher rates of income tax
50% top rate of income tax for people earning over £150,000
Abolish non-dom status.
Lib Dems
Increase personal allowance to £12,500
Tax on homes worth over £2m
Increase charges to non-doms
UKIP
Increase personal allowance to £13,500
Scrap inheritance tax
Cut business rates for small businesses
Green
Crack down on tax dodging
Wealth tax of 2% on people worth £3m or more
60% income tax rate for £150,000 and more
SNP
50% top rate of income tax for people earning over £150,000
Abolish non-dom status
Crackdown on tax avoidance
Plaid Cymru
50% top rate of income tax for people earning over £150,000
Increase level at which National Insurance contributions are paid to same level as income tax
Devolve more tax powers to Wales
Christian Peoples Alliance
Change National Insurance so hundreds are better off by up to £507
No Wealth Tax
Scrap corporation tax
The Christian Party
30% top rate of tax for incomes over £100,000 per year.
Income tax threshold of £12,000
VAT cut to 5% and finally abolished