What they can do is to revoke Article 50 to allow more time to sort out how we are going to leave seeing as the politicians can't decide at the moment.
You're banging on about there being no requirement and I'm just pointing out that, equally, there is nothing that prevents it. You don't want it because your shitting yourself that people are more educated about the situation than they were two years ago and the vote may swing the other way...
A bit long winded! You bang on about there being no requirement but where does it say that you can't have a second referendum before end of the two year period?