I found this one before. This is Clayton Fredericks. I am trying to find which horse. I thought it was Burghley 2010, as he is pictured below, but it's not the same horse. So still working on the horse.
The most famous version of this type of fence would be Cottesmore Leap at Burghley. It's "the picture" to get on a XC course made up of some of the most intimidating jumps in the world. It's been on the course for years and years.