pound sterling
鎊 centers on the pound sterling, the currency unit. It is a specialized character used for this monetary meaning.
鎊 combines 金 (metal, money) with 旁, which likely contributes the sound ホウ. It was created to represent the pound sterling as a monetary unit.
The left side 金 means metal or money, and the right side 旁 suggests the sound. Together they form a character for a specific currency: the pound sterling.
For ホウ, imagine a British pound coin with a hole in the center: hole -> ホウ, and the metal coin is the pound sterling.