Probably most people in Iran agree with the laws that gay people should be executed.
Based on your "social contract" theory, that's just fine? I mean, who are you to tell the Iranians that they shouldn't have a law? Right?
UK is democratic and the elected reps' body is sovereign over law.
An Iranian cannot stand for election in her region on the platform of: I am going to repeal "Islamic" law.
A person can stand for election in the UK saying: vote for me and we'll repeat the 2003 Communications Act.
I don't think that you didn't know this, so I don't understand why you asked it really
Sorry, no.