Complex sentence: All Bank of England notes now carry a copyright message on the face as a direct result of Boggs's activities, the idea being that if they cannot secure a counterfeiting charge, then they can at least secure a copyright violation.
Split into simpler sentences: All Bank of England notes now carry a copyright massage on the face directly as a result of Boggs's activities. The idea being that if they cannot secure a counterfeiting charge, at least they can secure a copyright violation.