OK, I think that I have got this wrong. ''The Paisley Daily Express has seen X-rated pages that are filled with pictures of scantily-clad sex workers, with details of how to arrange a meeting.'' This does not mean that they were in that paper. Oops. Although their sentence is a bit ambiguous, and perhaps deliberately so, IMO.
As has been pointed out above, why focus on Paisley? Maybe they could run another shit 'article' on another area on another day, where they have another local paper. It helps fill space, which is what its all about.