Im mad into my horse racing and have a couple of good contacts through different outlets - Jockeys, Bookmakers etc
The national is a tough race to call, apart from backing Tiger Roll last year, I havent had much luck on the national. my last win before that, believe it or not, was Auroras encore, I got 80/1 the morning of the race and won a rake of money.
My Bookies man says that Anibale Fly will be close, he tipped it for the gold cup this year and of course was a close second. I havent seen anyone else that knows their stuff yet.
Ballyoptic @ 50/1 looks in incredible price to me, that will get a good following at such a good price.
Tiger Roll is incredible, but theres a reason only one horse has ever won back to back GN's, it can take on piece of bad luck and your gone.