I'm afraid that looking for the Commissioner's Decision/UT decision you require would be like looking for the proverbial needle in a haystack.
There are literally thousands of decisions available on the web, and unless you have a point of reference, it is unlikely that the decision you require could be easily found.
There is however a possibility that members could be aware of, or have used the decision in question, so I think that if they have knowledge of the decision and can provide details, that would be your only realistic chance of finding it.
Nothing on this board constitutes legal advice - always consult a professional about specific problems