Left and Right are not useful labels any more, if they ever were. They don't even mean the same things everywhere. I am “right wing” (I would just say right) when it comes to economics but a liberal in social respects. For example I literally do not care who does what to whom sexually as long as everyone involved is a consenting adult and I am left out of it unless I choose otherwise.
I would have tried to dissuade a partner from aborting our child had the case arisen. If she’d insisted I doubt I would have ever been able to get over it — or stay with her. Yet to avoid criminalising women and / or driving them into the hands of backstreet charlatans, I would not legislate on the subject. I would leave it to their consciences. In my heart I am pro life. In my head I accept a woman's right to choose. Am I left or right? No answer to that question will inform our discussion so why ask it?
On Continental Europe and in America there is a "religious right". I have no truck with that. Many Continental friends quite wrongly think themselves leftists because neither do they. Their calling themselves leftists tells us nothing useful about them.
I am a reluctant atheist who would love there to be a just God. If there is I am damn sure He has all necessary tools at His disposal to smite or forgive sinners as He sees fit. It's a blasphemous insult to offer Him the puny help of Parliament, Congress, National Assembly, Duma, Sejm or Bundestag. He would find it hilarious I suspect. But then if He’s not laughing at His various churches generally, He’s not the superior Being of my imaginings.
A legal system to my taste would therefore have literally nothing to say about marriage, abortion or sexuality in general. If it's a sin, brother and sister, the Lord will deal with it. All we can do is try to follow His will and hope He understands our choices. Dear fellow atheists, you should have enough principle in you to allow believers to follow their Lord as best they can without interference from a state many of you are currently urging on like a bully's lickspittles.
For religious and non religious alike marriage is principally an agreement between adults as to how to live together and raise children. Nothing could be more private and so it should be left to them. If they're religious then their God will be the third party to their agreement. He needs neither legislator to set the terms nor lawyer to litigate them. The law need only specify the minimum responsibility of parents to the children born into the contract without their consent. Everyone but the child is — after all — a volunteer.
In truth I think very few things are the legitimate business of the state. That's lucky because the state is a flawed human institution almost inevitably staffed by the least appropriate people — the ones attracted to lording it over their fellow humans while living at their expense. A drooling idiot is likely more often to do the right thing than a government agent.
I express it colourfully but in essence that used also to be the stance of the Conservative Party in Britain. Back in my student politician canvassing days I remember a Tory MP, when asked whose permission a constituent should ask to fell a tree in his garden, replying "It's your bloody land you fool. Do as you damn well please". The question itself was in his view the pathetic weakness of a submissive serf.
By those robust yeoman standards the party led by Mrs May is not worthy of its name. Few Conservative Parties in the West now are. If you think tax avoidance “costs” Society, then you believe all wealth belongs in truth to the State and the individual is just its creature. If you think it’s a good idea to take money by force from those (based on past performance) most likely to generate more wealth and give it to those (ditto) least likely then you are a Socialist — an adherent of the most comprehensively tested and unquestionably failed idea in human history — wherever you place your X on Election Day. That goes for you, Prime Minister.