Look left down Bank Street to see the ornate facade of the Bank of Scotland headquarters, a symbol of the city's continuing important position in the financial world.
The Bank of Scotland isn't very important to the financial world. 
mnli hypothesis: The Bank of Scotland isn't very important to the financial world.  premise: Look left down Bank Street to see the ornate facade of the Bank of Scotland headquarters, a symbol of the city's continuing important position in the financial world.