Supposedly the Tories are rather fond of a book by Varoufakis outlining a strategy where you delay and derail all the bureaucrat-level negotiations based on rules and regulations, and then at the end force a political agreement that isn't bound by inconvenient preexisting treaties etc.
If true they might actually think they are really cunning and biding their time until there is almost no more sand in the hourglass. Then they can spring their cake-plan on an EU so desperate for some sort of deal that they get their way.