Why Britain Keeps Communication Channel With Iran Open

Times of London

"An hour before Iran launched a salvo of ballistic missiles at Israel on Tuesday, David Lammy, the foreign secretary, received a phone call from his counterpart in Tehran. [...] The US has no diplomatic relations with Iran and also uses the Swiss as an official “neutral arbiter” to convey messages, said Kasra Aarabi, a director of IRGC research at the campaign group United Against Nuclear Iran. "