Linked to other copies on the site and this one still needs to have the label changed to Decca as PhilMH noted a year ago. We might as well fix up B1 "Get Off My Loud", C2 "Et's Spend The Night Together" and D3 "Street Ighting Man" while we're at it. Odd that the original Australian black cover version hasn't surfaced yet it sold bucket-loads over here. Has anyone sent a correction?
Primary label is clearly Decca, with Telmak as marketer. This is most likely not a 1975 release; that is the copyright year applicable to this collection's first release in the UK in November 1975, and the first Australian release via EMI had catalogue number ROST 1/2, same as the UK, with a dark background to the cover, and that entered the Australian album chart in March 1976, which suggests a release early that year (it was pretty usual at the time for albums, even by major artists, to be released in Australia two or three months later than overseas). PolyGram re-released this collection, again with the dark cover and catalogue number ROST 1/2, in about 1981 after the Decca licence switched from EMI following PolyGram's purchase of the label. So, I would guess this Telmak-marketed release (which appears not to have charted in its own right) to be a later 1970s issue.