The issue of single versus multiple supplies in the context of the GST is the subject of frequent litigation. This is likely attributable to the fairly fact-driven analysis employed by the courts in determining the existence of single or multiple supplies and the arguably subjective nature of the test applied to those facts.
The recent Tele-Mobile decision (2015 TCC 197) will likely do little to reduce the frequency of this issue coming before the courts; however, it does provide some additional clarity on how the issue should be analyzed.