When do these go on sale or are they already please? I know I was startled to find 2010 ones still on sale in February as I thought they sold out really fast, but I want to splash out on really good tickets for me and my friend.

Usually late September/early October. They tend to not sell out now since they started using the bigger arena, but the best seats will go first of course.

Great thanks, that gives me time to get organised and hopefully for my friend's health to improve so we are reasonably confident she will be ok by March!

We bought ours at Crufts last year, and had a pick from several good seat positions, we ended up directly opposite the entrance, with a great view of the whole arena.  Ended up only watching the Gundog group from our seats, and watching BIS itself on one of the screens while keeping a friend company who had been in the group, but there were lots of vacant seats in most parts of the arena.