I think it was Harold Wilson who said 'One vote is enough'. It was a clear gap. France joined the EU by a voting majority of only 0.5% - and that was not established until the votes from the overseas territories were counted - until then they weren't going to join. So no, not another in/out referendum. We were told clearly enough that our vote would be acted on.
I'm unsure about another on the terms of any agreement as ,personally, I do not think that a general one will be reached. (Smaller understandings in areas such as research, intelligence etc. are only sensible and individual arrangements will follow.)
If the mandarins were to frame a question such as 'Accept the deal' or 'Do not accept the deal so reapply/try to stay in the EU' - then it would be devastating for this country, since no good deal will be offered - especially if remoaners carry on as they are doing. We'd be sunk.
If the question were phrased as 'Accept the deal' or 'Leave with no deal' it might possibly be acceptable in terms of fulfilling the result of the first referendum. But, as I have no faith whatsoever that that would be on offer, I will say 'No' to another referendum. The die was cast, we knew what we were doing (refer to the leaflet delivered to every dwelling in the country) we live with the result.