The only responsible thing to do would be to have a fresh general election. If there have to be any delays in doing that, a temporary shared administration could be set up for the next few weeks. Ken Clarke would be a possible interim Prime Minister.

WHY?

The result could be just the same, and prove to be a complete waste of time and money. This is not the first time we've had a minority government, or a coalition.
They have the justification of having been put in place following the correct process. Just let them get on with it.

Or are you looking at the EU view, insist on re-running elections/referenda until you get the 'right' result?