A Royal Navy cruiser with twenty torpedo tubes

What would lead the Royal Navy to build a cruiser with twenty 533 mm torpedo tubes in four quintuple mountings?

The suggested route is an influential advocate securing approval for a torpedo-cruiser concept.

The proposed cruiser would carry twenty 533 mm torpedo tubes in four quintuple mountings. The answer suggests that approval for an influential advocate's torpedo-cruiser or torpedo-carrier concept could lead to such a ship.