This column comes from Puerto Pollensa in Majorca, my favourite off-season watering-hole. The hotel is full of elderly Daily Mail readers intent on making their gin-and-tonics last longer as they contemplate the news from home. Brexit is highly likely to mean ‘hard Brexit’ — departure without residual access to the single market or meaningful new trade deals with the EU or anyone else — and HM Treasury thinks that could cost £66 billion a year in tax revenues.