Re: Hmm
I don't think there's any evidence that all those campaigning for leave* had any idea what to do after the vote. Cameron was going to stay on and run it. Where was the essential planning before the vote? Where were the impact assessments? Where was the cost/benefit analysis?
Vote Leave were caught in the headlights by winning and then being left to deal with the reality of it. They still are. That's why they're "dicking around" in your words. It's all they've ever done. Their one hope is that, arguing form a position of extreme weakness, they can persuade the EU to give them a safety net.
* Those that actually believed they could win which I'm not convinced with all of them.