The horse, whose jockey Derek Fox wore a Saltire jersey, is trained by Lucinda Russell in Perth and is the second-ever Scottish victor and the first in 38 years.
The post time for the historic race at Aintree is scheduled for Saturday, April 8, at 5:15 p.m. GMT+1 and will be broadcast on ITV.
Russell, ably assisted by former champion jockey Peter Scudamore at her Kinross base, finally laid the ghost to rest after a long wait since Rubstic's win in 1979. "What an incredible day". Trainer Lucinda Russell has become just the fourth woman to win the Grand National, after Jenny Pitman, Venetia Williams and Sue Smith, and a delighted Russell admitted it was "out of this world" to have a horse like him.
He said: "One of the jockeys stuck his head in as he was passing and shouted, 'We won the Grand National!'"
They raced the gelding in the name of The Golf Widows, starting the season at Kelso in October before finishing fifth in the Becher Chase at Aintree in December and winning Warwick's Classic Chase in January.
"We got a message about what he had done and that he had a good ride in the National and it looked unlikely".
He is sweet on his chances - his previous runner was 13th - and is a dream ride for Danny Cook, who Ellison says his orders to him will be "to stay calm".
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Fox also reflected on his battle to get fit in time to take up his ride after breaking his wrist a month earlier in a fall. I said to them this might be the greatest fun we ever have.
I can't believe it.
"I just know that he stays so well and he put in some fantastic jumps".
"He seems to have matured an terrible lot this year and I certainly wouldn't be swapping him for anything at this stage", said 34-year-old Tom Scudamore. If you had said to me an hour before the race you can take him home now as the ground is too fast I would have put him in the lorry.
He added: "The racecourses here in Scotland, they are the best administered, the best racecourses I've ever come across".
"The day has really been about the sheer volume of business and interest, obviously driven by the fact it is trained locally in Milnathort by Lucinda Russell and given that Derek Fox rode with the Saltire on his silks".
His father, Michael, rode the 1959 victor and son, Tom has a great chance aboard one of the favourites, the David Pipe trained Vieux Lion Rouge.