Wouldn't be surprised...
I've had some exposure to "technical capabilities" of various agencies. (US, not UK, but they recruit the same type of people.)
I wouldn't be surprised if they are looking at the WIN386.SWP, or maybe some files in the recycle bin. (If you don't use the recycle bin to look at them, they have apparently garbage names. It's done so you don't accidentally 'find' a deleted file with a search.) Then again, it could be some leftover temp files or something.
I remember several years ago when an agent was in a local office supply store to get printing samples from the various printers. He was rather freaked when I pointed out that most of the inks and toners were made by only a couple of companies, and the fonts they printed were software based and could not be used like the old typefaces of typewriters for identification.
As to whether I agree with this ladies actions and affiliations. From what little I've read, probably not. It still doesn't change the fact that she has rights and should be treated fairly. The ends Never justify the means. If those tasked with upholding the law break or otherwise corrupt it, they should be dealt with immediately and harshly.
(Now if our own justice department would recognize that and deal with the out of control hedge on penn. ave in DC... Along with shotgun-dick.)