WASHINGTON, Dec. 28 -- Law firms assisted companies in the following recently announced transactions: * * * Bryan Cave Leighton Paisner... ...advised Edge and its joint venture partner Goldman Sachs on securing the first tenant at the EDGE London Bridge office development, supporting the closing of an agreement for lease with ServiceNow for 50,449 square feet in what represents Edge's first UK pre-let. The firm advised across the full lifecycle of the pound sterling230 million development, in more ST