I'm just back from OpenStack PTG (Project Technical Gathering) in Dublin, Ireland and while I was there, Firefox reported wrong TLS certificates for some obscure websites, although not others. Example: zaitcev.us retains old certificate, as does wrk.ru. But sealion.club goes bad. I presume that Irish authorities and/or ISPs deemed it proper to MITM these sites. The question is, why such a strange choice of targets?
The sealion.club is a free speech and discussion site, named, as much as I can tell, after an old (possibly classic or memetic) Wondermark cartoon. Maybe the Irish just hate the free speech.
Or, they do not MITM sites that have TLS settings that are too easy to break... and Gmail.