This is just more of stupid...
A referendum by now will require an extension. An extension requires not only the Westminster manages to agree on it, but also that the EU accepts it. For the EU to accept it there might be some concessions required and it also requires that everyone agrees on the length of such an extension!
And if the extension is granted, the different choices in the referendum must be decided on – and also the number of choices!
In fact, some requirements for those choices might be a requirement for any side to approve of the extension, so then the referendum must also be fought out before an extension can be agreed on!