How Canada might have employed a wartime cruiser

If Canada had possessed a cruiser at the start of the Second World War, who might have commanded it and where would it have served?

A Town-class cruiser would suit Atlantic operations, while an Arethusa-class ship would be more likely in Norway or the Mediterranean. The suggested captain's name is unclear and his junior rank is a stated obstacle.

A hypothetical Canadian cruiser at the start of the Second World War would most plausibly be a Town-class or Arethusa-class ship. A Town-class cruiser could operate in the North Atlantic and perhaps join South Atlantic operations against Admiral Graf Spee. An Arethusa-class ship is placed in Norway or the Mediterranean. The preferred prospective captain is described as too junior, but his name cannot be identified securely.