Original: One of the marching songs of the British Union of Fascists was set to the same tune, and its lyrics were to some extent modelled on the Horst-Wessel-Lied, though appealing to British Fascism.
Simplified: The anthem of the British Union of Fascists was set to the same tune, and its lyrics were to some extent modelled on the Horst-Wessel-Lied, but appealing to British nationalism rather than German nationalism.