Ever since Gordon Lord Byron's Group One win back in 2013, the first Irish-trained to win the contest since Abergwaun 41 years ago, the contest has been conquered by the British.
However, trainer Joe Murphy hopes to change tradition and strike gold this weekend with his Brown Gelding.
Gustavus Weston is 9/1 with Planet Sport Bet for Saturday's showpiece, having won both the Group Two Greenlands Stakes and the Group Three Phoenix Sprint Stakes at the Curragh this season.
But Murphy has warned he will line up on Merseyside only if there is some ease underfoot.
He said: "We won't be running if there is any 'firm' in the ground.
"They're watering the inside track and they're not watering the straight track. We just wouldn't want it firm - and my English peers tell me that when Haydock dries out, it dries out very quick.
"This has been the plan, and we're delighted with the horse.
"I would love to go, but we would want minimum good ground."
Should connections ultimately decide against bidding for Sprint Cup glory, Gustavus Weston is likely to be rerouted to the Derrinstown Stud Flying Five Stakes at the Curragh on Sunday week.
"We have the five-furlong race in the Curragh, and we're supposed to get plenty of rain during the week," Murphy added.
"The Curragh will always be good because of the watering system, and I've no problem with good ground.
"If we thought the rain was coming we'd gamble and bring him over (to Haydock), but at the moment they tell me the rain isn't coming until Sunday.
"We're monitoring the weather and we'll just have to see what happens."