The Conservatives address LGBT issues directly in their manifesto:
"We will champion equal rights and correct past wrongs. Our historic introduction of gay marriage has helped drive forward equality and strengthened the institution of marriage. But there is still more to do, and we will continue to champion equality for Lesbian, Gay, Bisexual and Transgender people. We will build on the posthumous pardon of Enigma codebreaker Alan Turing, who committed suicide following his conviction for gross indecency, with a broader measure to lift the blight of outdated convictions of this nature. Thousands of British men still suffer from similar historic charges, even though they would be completely innocent of any crime today. Many others are dead and cannot correct this injustice themselves through the legal process we have introduced while in government. So we will introduce a new law that will pardon those people, and right these wrongs."
The Labour Manifesto is a little more vague, but it does explicitly pledge a focus on stamping out homophobia, in particular tackling the culture of homophobic bullying in schools and strengthening the law on all hate crimes, including homophobia (which is named specifically). They have also pledged to introduce age-appropriate sex education, which presumably includes (though this is not explicitly stated) education on sexuality. In the run up to the election, Ed Milliband has also pledged that the Party will also appoint an International LGBT Rights Envoy to promote LGBT rights worldwide.
The Liberal Democrats explicitly address many LGBT issues in their policy (including the blood donation ban and transphobia), but their only explicit LGBT-centric pledges in their manifesto is this:
"The Liberal Democrats want to establish a tolerant and inclusive environment for all pupils in schools. We will work with schools to stamp out homophobic and transphobic bullying, and to establish an inclusive environment for all children. We’ll extend the protections in the Equality Act to prevent bullying and harassment in schools based on sexual orientation and gender reassignment.
We’ll also legislate to make homophobic chanting at football matches a criminal offence, like racist chanting."
The Green Party's manifesto addresses LGBT issues extensively, pledging to:
The Scottish National Party are yet to release their full manifesto for the coming election, but leader Nicola Sturgeon recently addressed the Party's LGBT group with the following:
“Making Scotland a fairer, more equal place for all our citizens is at the heart of the SNP’s vision for our country – and it is absolutely right that LGBTI issues are put front and centre ahead of the General Election in May... Too many LGBTI people in too many countries still face the most extreme forms of prejudice and hate – our voice must be one of those arguing and advocating for equality, tolerance and love. That is why a team of SNP MPs elected in May will support the establishment of a special envoy, a diplomatic post within the Foreign Office, to promote the rights of LGBTI people throughout the word, as an integral part of UK foreign policy...
The stain of intolerance will not be removed entirely from our country or culture overnight – but by the laws and values we promote we can and will move ever closer towards the good society where everyone feels safe and valued and above all equal – regardless of sexuality or gender, race or religion, ability or disability. That is the vision of a One Scotland I am pledged to.”
Plaid Cymru are also yet to release a full manifesto, but their policy toward LGBT issues on their website states:
"Plaid Cymru believes that there are still major advances in the march to LGBT equality.