Here is the Ubuntu logo (in black), superimposed on top of the HMR logo:
By superimposing the Ubuntu logo on top of the HMR logo, it makes it easier to show the differences between the two logos. Both logos are 85 pixels wide and 85 pixels high.
1.) The HMR logo is of a different color.
2.) The HMR logo is thicker.
3.) THe HMR logo is rotated slightly clockwise.
4.) The space between each "friend" in the HMR logo is much narrower. Similarly, the space that separates each "friend"'s head from their respective bodies is narrower.
5.) The center circle in the HMR logo is wider than the center circle in the Ubuntu logo.
Therefore, this logo wasn't a simple copy-and-paste job as you suggested. This was made from scratch and coincidentally looks like the Ubuntu logo.
I think if its rotated a tiny nudge it will be a thiner copy of Ubuntu's Logo.
http://web.archive.org/web/*/hmrgroup.co.uk/* The Way back Machine has not records of this site, so it could be new site. Possibly based on the Ubuntu Logo.
Notice that even rotated, the Ubuntu logo is still different.
I remembered a case like this, both Logo's had differences and similarities. Yet at the end the logo was taken down with out reaching a lawsuit.
Manipulate it all you want.