By Charlie Conchie The City minister doubled down on the government’s collision course with regulators today as he laid out a choice between “high regulatory barriers” and making the Square Mile “competitive” on the global stage. Speaking at the City Week Summit in London this morning, the Economic Secretary to the Treasury Bim Afolami said there was no benefit in making the UK the “safest graveyard” as he called for closer engagement with China and the EU on financial services. The comments are likely to ramp up tensions between Westminster and the City watchdogs after a furious backlash to t…