I saw it too on meridian news. It may be on BBC southeast today as well as I know the owners have emailed them the story. I really hope they find him.He has been missing since Friday which is a long time in this weather.
I guess it is possible but I know most of the horse owners in the area and I certainly haven't heard anything along the grapevine of a horse being found,although that is not to say someone hasn't been able to pick him up from elsewhere.
There are alot of ditches running all across the marsh including the camp so it is also possible, though i really hope not,that he has fallen in one of the ditches.