The master of Seven Barrows, who has yet to break his duck in the big race, thought for a brief moment that long-time leader Mister Coffey was going to win the first chase of his career when three lengths clear at the penultimate fence, only to tire and finish eighth under Nico de Boinville.

“There was a moment,” laughed Henderson. “The only thing you could say, is if people are going to protest about what horses do, have you ever, ever, ever seen a horse not enjoy himself more?

“He absolutely loved it, didn’t he? It is absolutely living proof that this is what these horses want to do.

“There is the odd one that gets a bit sulky at times, but watching most of these horses, that can only tell you one thing – they love their job.”

The start of the four-and-a-quarter-mile handicap was delayed by almost 15 minutes as animal rights protestors got on to the Liverpool course and attempted to secure themselves to railings and fences.

The delay meant that horses, who were already saddled and in the parade ring, were removed for a time, returning to the saddling boxes and pre-parade ring.

When the race was eventually given the go-ahead, Hill Sixteen, who had never before fallen, suffered a fatal injury at the first fence and five others were unseated. Two more fell at the second fence, although none fell thereafter.

Henderson scoffed at suggestions that the field size – 39 horses lined up from a maximum of 40 runners – is too big and hinted that the delay caused by protestors may have affected some horses more than others.

He said: “It doesn’t do them any good, but to be fair, everybody did their best and did as good a job as they could to get the race going.

“They did well to get wind of what was going to happen and what they (protestors) were planning. I think we all expected it to happen. They were going to have a go, but it was a pretty pathetic show.

“There are certain horses that it would affect. With Mister Coffey, it didn’t worry him.

“I just let his girths out after they went back to the top paddock. That is a reasonable thing to do, because once you tighten their girths, they know what they are doing.

“He was very good, but if it had been Jonbon, it would have been a shambles. It would have been game over. He couldn’t have taken that (delay).

“But as to suggestions we need to reduce the field size, no. We should have had a reserve.

“It is part of the spectacle. That is what the race is all about. The start is always going to be difficult with 40 horses – everyone wants to be up there, of course they do.

“But it’s the essence of the race. We are not fiddling around with some little gymkhana, you know.

“The race wasn’t helped by the protestors and it depends on your horse, but Mister Coffey is not someone who is going to get himself in a fuss.

“Had it been Jonbon, it would have been a different ball game.”

Eight-year-old Mister Coffey will be campaigned with the National in mind next season, following his excellent showing.

Though he has yet to win in nine starts over fences, he has been running in very good company. Runner-up in last year’s Kim Muir at Cheltenham, he has twice finished as bridesmaid in two decent handicaps this season before finishing placed in the National Hunt Chase on returning to the Festival meeting last month.

Henderson added: “Of course we are going to build around the National next year.

“Mind you, I’m going to try to win a race with him first.

“He has been a bit unlucky, but it is not as if we have gone down to the bottom level to try to win a maiden chase.

“He’s been to the Cheltenhams and Aintrees and I would have thought we’d go to the same route to the end, but maybe the sensible thing to do is to try to win a couple of little races before Christmas then put him by for Cheltenham and then the National. He is improving.”

Though Jonbon gave Henderson and jockey Aidan Coleman an easy success in the Magull Novices’ Chase to open Saturday’s card, the trainer was still scratching his head after Marie’s Rock was overhauled by Sire Du Berlais in the Liverpool Hurdle.

The Stayers’ Hurdle winner looked well held turning for home, but came with a remarkable rattle to outstay his rivals, with Marie’s Rock having looked all over the winner under De Boinville when leading on the bridle jumping the penultimate flight.

Henderson, who also saddled eventual fifth Champ, added: “No one saw that winner coming. I knew where the winner was because he was in the JP (McManus) colours upsides Champ at the back the whole time.

“I was always looking back to see where Champ was and the winner was going worse than Champ. Quite a lot worse!

“You couldn’t believe it. When we arrived on the bridle two out, you could not believe that was going to happen.

“She’s fine this morning. She will go three miles all year now.”

Sandy Thompson’s Hill Sixteen suffered a fatal fall at the first fence in the National – which was delayed by around 15 minutes after animal activists got on to the track – adding to the deaths of Dark Raven earlier in the afternoon and Envoye Special on Thursday.

“Our thoughts are with everyone connected to the horses who suffered fatal injuries this week. No one will be more affected by this news than the trainers, owners and stable staff who have provided these horses with first-class care and attention throughout their lives,” Harrington said in a statement.

“The BHA and Aintree racecourse will now analyse the races in painstaking detail, as is the case every year, to build on our existing data and help us understand what caused these incidents.

“British racing works tirelessly to improve the sport’s safety record and reduce avoidable risk. Every incident is reviewed by the BHA alongside the racecourse and other bodies. As a sport we have for years shown great determination and commitment to improve welfare standards by taking measured scientific, evidence-based, regulatory and education-based steps.

“It is for this reason that the fatal injury rate in the sport has reduced by over 1/3 in the last 20 years, to 0.2% of runners.”

Reflecting on the protestors on the course, Harrington said: “We respect the right of anyone to hold views about our sport but we robustly condemn the reckless and potentially harmful actions of a handful of people in disrupting the race at a time when horses were in the parade ring.

“Those involved in British racing are rightly proud of our sport and the role it plays in providing an unparalleled quality of life for horses bred for racing. Love and respect for horses is at the heart of everything we do.

“The Grand National is and always will be an iconic sporting event and the actions of a small number of people will do nothing to diminish its huge and enduring international appeal.”

Jockey Club chief executive Nevin Truesdale believes racing needs to be pro-active in the debate with activists.

“What this has done has bring the issues the sport was facing to the fore and allowed us to get out there and talk about them confidently – because we should,” Truesdale told Racing TV’s Luck On Sunday.

“We should be out there talking about the measures we’ve taken, how much care these horses get, the changes we’ve made over the years, not just at Aintree, but everywhere and we should be proud of that.”

Truesdale and his team had employed a huge security presence, but it was still not enough to prevent some protesters from getting on to the track.

“We should be out there calling the protestors what they are, which is law breakers. The impact they had on the horses yesterday would have been completely at odds with that they are trying to achieve,” he said.

“We should be telling our story positively, that is what we should be doing. We don’t want this to become a war of words as that doesn’t seem to cut through to these organisations. What we should be doing is engaging with the more rational organisations like World Horse Welfare and the RSPCA, all of whom can see the changes we’ve made and who continue, rightly, to put us under pressure to make more changes.

“I was with Roly Owers (World Horse Welfare chief executive) yesterday on the radio and I agreed with pretty much everything he said and those are the people we should be working with as a sport whilst telling our story.

“A site of that size and that layout is very difficult to completely secure. You could never look people in the eye and say ‘that can’t happen’.”

On protestors making it on to the course despite their intentions being well publicised, Truesdale said: “I actually walked it yesterday morning and even then we had hi-vis policeman out on the other side of those fences.

“I think the police and our security teams deserve immense credit for the effort they put in, they did as much as they possibly could but the reality is we were never going to prevent that on a site of that size and layout. I thought it was dealt with extremely efficiently and well but we will continue to review security as we always do.

“The fact there was only a 15-minute delay is a tribute to everyone involved.

“We need to review the whole thing over the next few weeks, it would be wrong to give specifics this morning. The BHA team will do that and come up with any recommendations as they have done every year. We should be setting the tone and saying we will not rest until we continue to reduce fatality rates. I’m sure there’s plenty we can come up with.”

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