By Ali Lyon Morgan Stanley has decided to retain its flagship Canary Wharf office in a major boost for the struggling financial district, according to reports. The American investment bank, which began looking for a new HQ in 2020, has decided not to activate an upcoming break clause on its base in London’s banking district, the Sunday Times reported. The move comes after covid lockdowns and flexible working prompted the bank to review the need for such a large European headquarters. Its agreement with Canary Wharf included a break clause and the lender had mulled moving elsewhere as it weighe…