The EU launched two legal proceedings against Britain on Monday, alleging that London had broken a protocol of its Brexit divorce agreement covering Ireland. "The EU and the UK agreed the protocol together. We are also bound to implement it together," EU vice president Maros Sefcovic said in a statement. The battle marks a bitter new setback to post-Brexit cross-Channel relations just two months after the EU and Britain secured a hard-won trade deal and 15 months after the UK's divorce from the bloc. arp/dc/kjl