Perhaps I should know this -but I don't.
I just found a copy of the Aus Tour Ediiton of 60 miles an hour single and it lists the REading festival version of temptation as being written by New Order & Sumner. What the heck does that mean? Is this someone else who happens to have the name Sumner? Cos Sumner would be included in the umbrella of New Order, right. At a supreme level of confusion.