This is very sad. Just hunting on my lovely trig pillar site to see where the Exeter trig pillars are, when I realise I've already blogged one! Yes, the horse trig pillar I found is actually TP5282. Its description of "toppled or moved" is spot on. They don't (yet) have a category for 'adorned with horse head' though.
Maybe I could find this one tomorrow? I'm actually Exwick way as I'll be picking up someone for lunch. I've just had a text from a GP (General Practice) surveyor who I met at a conference in Germany. He'll be in Exeter tomorrow and is free for an hour or so. When in Munich I spent my time trying to work out why he liked doing what he does (I've never got my head around GPs) whilst simultaneously giving him a lecture about the limitations of Google Earth. Poor chap!