"This is the best feeling I have ever had, or ever will have", Fox said. He has done us proud, he has done Scotland proud and he has done everyone at the yard proud.
There was one minor blemish on One For Arthur's copybook at Aintree when he bumped runner-up Cause For Causes two fences from home.
"He's the type of horse that warms into a race - that's just his style of running - so I was-half prepared for it".
Despite jumping into Blaklion at the second-last fence, the 14-1 shot was spring-heeled at the final obstacle of the extended four-and-a-quarter-mile test.
The 24-year-old Irishman Fox rode superbly on his debut in the race, having only returned to competitive riding this week after suffering a broken wrist and collarbone in a fall on March 9, to claim the biggest win of his career.
Russell is only the fourth woman to train a National victor, after Jenny Pitman, Venetia Williams, and Sue Smith.
One For Arthur became the first horse from Scotland since Rubstic in 1979 to win the National when coming from well off the pace with a powerful run under Derek Fox to score in the colours of Golf Widows Belinda McLung and Deborah Thomson.
"What a fantastic day we had - it was just unbelievable", she said on At The Races.
Saint Are rounded out the placings a further 3.75 lengths back for trainer Tom George and jockey Davy Russell, with the horse making it two minor placings in the National, after finishing second to Many Clouds in 2015.
"For a horse like that and a jockey like that what could be better?"
"I couldn't believe how fast the first circuit went in my head. He's given us a fantastic journey". It's been an absolutely unbelievable day. "We are up very early and home very late in the winter with racing, so this just makes everything worthwhile".
McClung added: "I thought this morning, it's baking hot so there's no pressure now, he's not going to win on that ground but I have to say he's just shown his class today".
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His first ride in the world's greatest steeplechase, he spent three weeks in the Ryedale town building up his strength and declared, hours before the big race, that he'd never been fitter.