Last year's Melbourne Cup runner-up Red Cadeaux continued his progress with a comfortable victory in the Sportingbet Yorkshire Cup.
Tom McLaughlin was always travelling comfortably aboard Ed Dunlop's charge and he brought him through to pass the trailblazing Harris Tweed two furlongs out.
From there the race looked over, despite the 4-1 charge drifting towards the fair rail, but Glen's Diamond (25-1) began to charge home on the opposite side of the track.
He was never able to land a telling blow though, Red Cadeaux holding on by a length with the pair a length-and-three-quarters clear of Harris Tweed (9-4 favourite).
Dunlop said: "He's been a bit of a bridesmaid, but he was probably beaten by a very good horse at Kempton, who could be the number one stayer.
"He's adaptable from a mile and a half to a mile and six and he's won on good ground today so we know he acts on that.
"He was the first horse we took to Australia. He's not going to carry as little weight as he did last year and we will try go one better.
"It's a big day for the horse and the team. He's been a star for all of us and it's fantastic. He's a gentle giant. He doesn't worry about life and he's improved phenomenally as he's got older.
"I'm very proud of the horse and the team and I'm particularly pleased for Tom as he's been a huge part of this horse's career. He obviously didn't ride him in Hong Kong or Australia, so well done Tom.
"Tom has ridden this horse in races before and at home. He has worked for me for a long time and is an integral part.
"Ryan (Moore) was going to come here, then he switched. Ronnie Arculli (owner) felt it was right to let Tom ride him.
"He was third in the Irish Leger on this horse and has done nothing wrong on him. He thought he went too soon.
"I don't know what we'll do now. He's in the Coronation Cup and we might give it a go. He's in the Hardwicke Stakes at Royal Ascot too. But today is a huge today as he's been a bridesmaid quite a few times and today was his day.
"Let's hope he stays in one piece. He'll race on until Royal Ascot and after than he'll have a holiday. Then he'll have a race again and then go back to Australia and maybe have two runs."
McLaughlin added: "This is my biggest win on these shores. I've won the Winter Derby and I won the Curragh Cup, but it's great to win on a horse like him."