The shadow over politics, the Brexit shadow, is one vast distraction. I feel I have to escape the shadow before I address other political subjects. But those other subjects – they’re all impacted in some way by Brexit, not least by the uncertainty associated with Brexit.

Take the environment, for example. UK environmental law is tied into European. Projects are EU-financed, standards, ideals, aspirations are shared. I remember at Finistera, at the end of the Camino, last autumn, noting how environment projects there were funded by the EU. I’d shared the Camino with many nations, and I loved that confirmation that many nations shared those standards, lived by a common framework. We know that Brexit free-traders cosy up to climate-change deniers, are casual about man-made changes to the environment – human ingenuity, they argue, has coped, and will always cope. All hinges on that one word ‘cope’.  Does the world we have around us, and that we’re projecting for our futures, mean that we’ve ‘coped’?

Human rights – the European Convention on Human Rights, which followed on from the UN Convention, and unlike the UN Convention is legally enforceable. Before the European courts. So for that reason we should exit it, according to Theresa May. As Philippe Sands (author of the remarkable East-West Street) pointed out when talking at the Cheltenham Literary Festival last Sunday, more than any other country we – the UK – gave Europe the convention. It was a British inspiration. Hersch Lauterpacht, who pioneered so much (beginning life in Lviv, in modern Ukraine: he left in the 1920s, his family were wiped out in the holocaust), was latterly a Cambridge professor.

Farming policy: how will policy change, how will farmers be financed, once we exit the EU, and exit the Common Agricultural Policy? CAP funding is based primarily on the amount of land farmed , so big farmers (mostly Tory supporters) benefit most. On the other hand, to quote a Scottish hill-farmer in a Reuters report: ‘The bloody-mindedness of the French or the Irish in standing up for agriculture was not just standing up for their farmers but brought a good deal for us as well.’ Post-Brexit, where will the money be directed? We are promised ‘a major policy overhaul’. Will the acreage farmed continue to dictate funding?  How might our landscapes change? Will the much-hyped new trade deals bring in cheaper farm imports , with knock-on effects on farm prices – other farming countries have more clout than we do. And what of cheap farm labour from Eastern Europe?  Michael Gove wants to prioritise the environment in any new scheme. But we’ve no idea how that will work out in practice, and legislation will be fast-tracked through parliament – fundamental changes pushed through with minimal public debate.

The Cheltenham Literary Festival has brought to the town an impressive range of politicians, journalists, singers (Peggy Seeger), mountaineers (Chris Bonington), sportsmen (Mike Brearley, Jonny Bairstow), TV stars, performers, poets, novelists….

Among the politicians was Chris Patten. I’ll leave his words to speak for themselves.

Referenda ‘are fundamentally anti-democratic in our system and I wouldn’t have anything to do with them’. (I can’t recall Patten’s exact words in Cheltenham – I’m quoting from another interview he gave.) Leavers in the Brexit campaign peddled a dubious notion of sovereignty (‘dubious’ was his polite word in Cheltenham – I see that elsewhere he’s spoken of ‘all this ideological crap about sovereignty and taking back control’). Brexit itself is ‘the single most calamitous act of self-harm in my lifetime’.

Philippe Sands, also at Cheltenham, put the remarkable achievement that the EU represents in the context of the preceding centuries of war. How casual can we be to turn our backs? He mentioned that Boris Johnson has been a friend for thirty years. How, he wondered, do you sustain such friendships in present times? Brexit has brought the obsessive tendencies of the further reaches of the Right, and Left, to centre stage. The centre ground of rational idea-based, truth-invigilated debate, is out of fashion.

Boris’s dad, Stanley, has written a novel. He and Vince Cable, also a new novelist, were a Cheltenham double-act. Boris’s novel assumes a Russian plot behind Brexit, enough to bring Brexit down. But he himself has changed sides from EU-supporting environmentalist to that contradiction in terms, a Brexit-supporting environmentalist.

Vince Cable outlined how higher education, the number of foreign students in the UK, intra-university cooperation across Europe were being threatened by Brexit. Stanley’s response, ‘Vince may be right, but he may not be.’ That was the limit of his response.

‘He may not be’ – that is standard Brexit-speak. You don’t need to address the detailed argument. It’s enough to suggest these days that’s there’s another point of view, however weak. And that point of view gets equal billing. The climate-change debate over again.

Jeremy Hunt, health secretary, is a one-time Remainer, now a Leaver – the damage, he suggests, to the economy that leaving was supposed to cause hasn’t happened. Is he now a convert to the hard-Brexit free-traders’ prognosis of a free-trade nirvana which will somehow subvert a world where protectionism and self interest are ever more asserting themselves? Or the Hammond soft version?

As the economy,  we haven’t left yet, we’re in a phoney-war period, a state of suspended grace which might just allow us to pull back from the brink – but the brink is too enticing. That itself is another aspect of Brexit – how supposed conservatives, the slow and steady incremental movers of politics, overnight become practitioners of brinkmanship.

Brexit is not only a bizarre course in terms of the economy, it is extraordinarily damaging to the democratic process, not just by giving referenda precedence over parliamentary democracy (so we have the question, can an act of parliament over-ride a referendum result – where does sovereignty lie?) but by polarising debate, taking out the common ground that most of the Right and Left shared until 2015.

Not only is the common ground not shared – it’s now scorned. So the John Majors, Chris Pattens, Nick Cleggs – they are old-school, flag-wavers of a different age. That would apply to me, and to most of my peers …