British Prime Minister Theresa May will call on the Commonwealth to boost trade and forge new links, launching a summit of the 53 nations which have become increasingly important to the UK as it leaves the European Union. Welcome to #CHOGM2018. What’s agreed this week matters to all of us. #ourCommonwealth@commonwealthsec @10downingstreet @royalfamily @foreignofficeuk @CWEICofficial @commonwealthorg…