UK Brexit minister David Frost on Wednesday called for cool heads in Europe as talk of a trade war increased amid an ongoing row over post-Brexit trading arrangements in Northern Ireland. Frost is set to meet European Commission vice-president Maros Sefcovic on Friday, with the UK widely expected to trigger a suspension clause in the so-called Northern Ireland protocol. The EU has warned of "serious consequences" if it does, prompting speculation the separate Brexit trade and cooperation deal could be pulled, and tariffs imposed. But Frost told parliament that four weeks of talks were not yet over and still needed to properly examine several points. "I certainly will not give up on this process unless and until it is abundantly clear that nothing more can be done," he told the upper House of Lords chamber. "We are certainly not at that point yet." But if that happened, "article 16 safeguards will be our only option", he added, referring to the protocol's suspension clause. EU member Ireland's government on Tuesday said it had met to discuss contingency planning in case talks break down, the UK suspends the protocol, and Brussels issues reprisals. Deputy prime minister Leo...