Ridden by Derek Fox, the eight-year-old son of Milan found plenty for pressure in the closing stages to register a decisive victory.
The gelding also became just the second Scottish-trained winner in the race’s history.
16/1 chance Cause Of Causes was second, with a further three and three-quarter lengths to Saint Are (25/1) in third. The well-backed 8/1 favourite Blaklion was half-a-length further back in fourth.
A delighted Russell said: “It’s just amazing. Everyone kept saying beforehand that the worst question a journalist can ask you is “how would it feel to win the National?” and you think “Oh for goodness sake, what would it mean?” – it means everything, of course it does.
“I am so proud of the horse. He jumped fantastically and I thought Derek gave him a great ride. He has done us proud, he has done Scotland proud and he has done everyone at the yard proud.
“Before the Melling Road, I was up with the owners and we just shouted: “We’re going to win the National!” With a horse like that and a jockey like that, what could be better? Derek is great at getting these horses to finish strongly and I knew that he would stay, so maybe it was a bit bold but it was right.
“It’s really funny how everything has gone right. The preparation for the horse – when we worked out what training he was going to have, we built in an extra week for something to go wrong like lose a shoe.
“We did lose a shoe but the farrier got up early on a Saturday morning and put it back on. Everything has just gone so smoothly, including winning the race.
“I always say that it’s fine, I am the figurehead and I am saying what is going on, but actually it is everyone back home who have done so much, from the farrier getting up on a Saturday morning to out vet coming here. We have got a fantastic team behind us and it is great – long may it continue.
“Also the support we have had from other owners. It’s hard when everyone is talking about one horse but hopefully we can continue to keep the winners coming for everyone.
“Peter is wearing his dad’s tie, so that has brought us some luck. I am delighted for the team and, without him, I couldn’t do it.”