Of course, this is Hislop's Have I got OLD news for you, because he's whinging about the Leave ministers vacating the field, but since then, Johnson, Fox and Davis have been made key ministers in delivering Brexit and will be judged on their actions.
If Remainers like Hislop want to spent their time crying "Woe is me" and "We're all doomed" that's a matter for them, but the majority of the population has voted to leave the EU and Brexit has to be implimented and given a real chance to work (which I have no doubt it will, particularly given the number of countries around the world that are anxious to reach trade deals with the UK as soon as we leave the EU). Meanwhile, we want good relations with Europe and the best reciprocal trading conditions.
Remainers like Hislop will have to comfort themselves that, in the highly unlikely event that in 20 years time, the EU is a financially flourishing, powerful trade block taking on the world (and not the inward looking, anti-democratic, terrorist-ridden, political and economic basket case it is now) and there is huge support in the UK for a referendum to try to climb the walls and get back in, then the government of the day should give consideration to this.