Never heard of the Coventry Observer. Sounds like an advertising free-sheet.
No clue how big it is, but my guess is quite small. Website says it's part of several local papers in the region, all with print editions.
Could well be a free sheet, though it's a damn sight more professional than the ones near me- advertising content clearly delineated, a couple of glossy advertising supplements, quite a lot of content, the couple of articles I read are better written than some of the churn found in nationals.
Can't find anything on their site.
Given how horrific the Challenor case was and given Aimee's continued political connections, I'm constantly astounded it did not get more attention.