It is pretty clear from this article that the SUN did not have a 'source' but were hacking Oliver Hoare's telephone...Quote
According to The Sun, Hoare (who was still serving as a liaison between the Waleses) called Diana "at least 15 times" in the days following a March 14 dinner with friends at a Chinese restaurant, after which he returned with her to the palace. "A royal source" told the paper that one call last April "started at around 8:30 at night and went on for close to [90 minutes]. Who knows what was being talked about, but they obviously had plenty on their minds."
Schoolboy NOT Diana Was Oliver Haore Phone Pest.
http://dianaunlawfullkilling.blogspot.com/2011/12/schoolboy-not-diana-was-oliver-hoare.html
