Unknown Acetate: He Who Laughs Last – Mystery Glam era UK Chugger

Unreleased Acetate - He Who Laughs Last -  Decca  Acetate UK (1973/74?)

Here’s a cool and unknown Glam era rocker. He Who Laughs Last is a catchy Chugger which sounds like it was recorded in 73/74. 
It’s starts off with a riff similar to Marcus Hook Roll Band’s classic Natural Man, then moves into James Hogg-like territory with added ivory tinkling. The backing vocals are pure Glam and there’s a fun posh announcer voice over around the 2 minute mark. 

So who the hell is this –Any ideas out there?

Hear a full version of He Who Laughs Last