Brittain said: “I don’t see why he can’t win again. The horse is in very good form and what he’s done already this year shows he has retained all his enthusiasm.

“He’s been looking pretty good in his work and I’m quietly confident of a big run from him.”

Warrsan has travelled the globe in his quest for glory and last December finished third in the Hong Kong Vase. This year, however, he could be kept closer to home.

Brittain added: “He’ll almost certainly be campaigned in England and if he pleases me at Epsom he will go for the Prince Of Wales’s Stakes at Royal Ascot.

“There are plenty of opportunities for him, including the King George, and I have no fears of dropping him back to a mile and a quarter at the Royal meeting.”

One of his rivals on Friday will be the Mick Channon-trained Imperial Dancer.

The West Ilsley handler reports his six-year-old to have come back well from an abortive trip to Singapore, where he ran disappointingly when favourite for the Singapore Cup at Kranji.

After watching his charge work impressively on the summer gallops, Channon said: “Horses like Imperial Dancer are hard to find and hard to replace. He’s a Group One winner and he never fails to impress in his work.

“Sometimes he needs things to fall into place for him in his races and it didn’t happen in Singapore, but he’s in tremendous form and is the type of horse you can run over a mile and a quarter as well as a mile and a half.”

High Accolade, who has been declared a runner by Marcus Tregoning, did not have the race in his original schedule and the four-year-old is running at Epsom owing to the quality of his work at home.

“High Accolade is in extremely good form and worked beautifully round the bend at Epsom with another of my horses last week. I think he’ll run a really big race on Friday,” said Tregoning.

“We were going to head straight for the Hardwicke (at Royal Ascot), but he’s so well in himself that this opportunity was too good to miss.”

Mark Johnston is making a twin assault on the contest with Systematic and Scott’s View, and the Middleham trainer recognises that the race represents a big step up for the latter.

Scott’s View made the frame in the Queen Elizabeth II Cup in Hong Kong in April but was beaten at odds-on in a Group Two race at Baden-Baden on Sunday.

Johnston said: “Hong Kong was undoubtedly his best ever run and now he needs to consolidate.

“He’s not been without the odd little problem, but the key to him is flat tracks, fast ground and a mile-and-a-quarter. While he won’t have two of those things at Epsom, I’m sure he’ll run a big race. Kieren Fallon will ride.”

Of his recent Betdaq Ormonde Stakes winner Systematic, Johnston added: “Compared to 2002 he had a disappointing time last year, when things went astray even though nothing was physically wrong with him.

“However, he’s bounced back at an admittedly lower level and is in great form.”

Any rain in the Epsom area will be welcomed by the connections of Dubai Success, winner of the Dubai Irish Village Stakes on his return to action at Newbury before a slightly disappointing effort in the UltimateBet.com Jockey Club Stakes at Newmarket.

Joe Mercer, racing manager to his owner Maktoum Al Maktoum, said: “Ideally his trainer Barry Hills would have preferred good ground, but as it’s not rock hard he’ll be fine and he’s a definite runner whatever happens.”

Godolphin will be double-handed with Prix de l’Arc de Triomphe fourth Doyen and Leadership.

Frankie Dettori will ride the former, who has been installed favourite by Coral, William Hill and Ladbrokes.

Neville Callaghan runs Magistretti, while Sunny Glenn and the French raider Vallee Enchantee complete the field.

Coronation Cup:

Coral: 9-2 Doyen, 11-2 Magistretti, 6-1 Warrsan, 15-2 Brian Boru, 8-1 Imperial Dancer, Vallee Enchantee, 9-1 Systematic, Scott’s View, 10-1 Leadership, High Accolade, 14-1 Dubai Success, 500-1 Sunny Glenn.

William Hill: 4-1 Doyen, 6-1 Magistretti, 13-2 High Accolade, 7-1 Brian Boru, Warrsan, 8-1 Vallee Enchantee, 9-1 Scott’s View, 10-1 Imperial Dancer, Leadership, Systematic, 12-1 Dubai Success, 500-1 Sunny Glenn.

Ladbrokes: 4-1 Doyen, 5-1 Magistretti, 6-1 Warrsan, 7-1 High Accolade, 8-1 Brian Boru, 9-1 Vallee Enchantee, 10-1 Imperial Dancer, Leadership, Scott’s View, Systematic, 14-1 Dubai Success, 500-1 Sunny Glenn.