Surrogacy is not a red herring in this debate

The referendum is about marriage, so why is surrogacy dominating the debate? Louise Doris looks at how a Supreme Court ruling recognised the right of married couples to ‘beget children’ 

On Friday, people will vote for or against changing the Constitution to allow two people to marry, regardless of their sex.

That is all the ballot paper says. So where has the idea come from that this referendum has anything to do with surrogacy? Is this claim legitimate, or is it just scaremongering by the no side?