Aidan O’Brien fined €4,500 following mix-up between horses at Newmarket

Trainer was quick to apologise after incident came to light last October

Aidan O’Brien faces large fine after case of mistaken identity at Newmarket

Embarrassment for Ballydoyle as wrong horse officially place third in fillies Group 1

Mighty Magical turns over Ghaiyyath at Leopardstown

Across the Irish sea Joseph O’Brien saddles Galileo Chrome to St Leger win at Doncaster

Ghaiyyath confirmed for Irish Champions Stakes at Leopardstown

The world’s top-rated racehorse will provide headline act to Irish Champions Weekend

Ghaiyyath set to add considerable sparkle to Irish Champions Weekend

World’s top-rated racehorse is one of 13 entries for Saturday’s Irish Champion Stakes at Leopardstown

Circus Maximus bidding for back-to-back wins in vintage Moulin

Saturday morning gallop will decide if Ghaiyyath goes to Irish Champion Stakes

Quarantine to be lifted for jockeys taking part in Irish Group One races

Change in Government protocols made ahead of Irish Champions Weekend

Ghaiyyath shows he is one of world’s best as he dominates Juddmonte International

Aidan O’Brien’s Magical finishes runner-up in a Group One for sixth time in her career

Enable can’t reel in impressive Ghaiyyath at Sandown

Aidan O’Brien’s Japan third as William Buick delivers a fine ride in Coral-Eclipse

Six to go forward for Aidan O’Brien in Saturday’s Epsom Derby

Moore on Mogul and Heffernan on Russian Emperor as English King heads the betting

Irish trainers weigh up options ahead of bonanza weekend of Classic action

Four Classics will be held in 24 hours between Epsom and Chantilly

Tom Hogan pays tribute after sudden death of Gordon Lord Byron

Aidan O’Brien witnesses the highs and lows of racing at Leopardstown as Year Of The Tiger put down

Ghaiyyath blazes a trail to take Coronation Cup at Newmarket

Aidan O’Brien’s Anthony Van Dyck comes home second in Group One contest

No joy for Jessica Harrington at her first Breeders’ Cup

Sharing takes the Juvenile Fillies as European horses fail to make a mark on turf

Stratum lands Cesarewitch at Newmarket for Willie Mullins

25-1 winner comes after another impressive performance from the unbeaten Pinatubo

Pinatubo puts in one of the great juvenile performances

Appleby-trained colt cut to 6-4 for the Guineas after thrilling nine-length rout

Europeans come up short at Breeders Cup

First day not one to remember for Aidan O’Brien and European raiders

Impressive Iridessa gives Joseph O’Brien a maiden UK Group One

14-1 shot beats Aidan O’Brien’s Hermosa at Newmarket as Limato resurgence continues

Wild Illusion takes Nassau Stakes as Aidan O’Brien’s Rhododendron struggles

Goodwood: Trained by Charlie Appleby and ridden by William Buick, the 4-1 shot stepped up

Poet’s Word gives Michal Stoute a thrilling sixth King George

Stablemate Crystal Ocean edged out at Ascot as Aidan O’Brien’s pair are well beaten

Kew Gardens attempting to become 13th Irish trained King George winner

William Buick on board Crystal Ocean as Stoute chases record

Aidan O’Brien bidding for Group One double on Saturday

Trainer aiming to land July Cup at Newmarket followed by Longchamp success

Threading can upset the Coronation Stakes boat

Sands of Mali is a major Commonwealth Cup contender

Study Of Man takes French Derby as Aidan O’Brien misses out

Pascal Bary’s colt takes Chantilly Classic with O’Brien’s four runners all failing to place

Masar gives Godolphin first Epsom Derby as Saxon Warrior falters

No excuses for Aidan O’Brien as Appleby and Buick combine for famous Classic victory

Breeders’ Cup: Gun Runner blasts from gate to seal Classic success

Front-running display secures big race win for Steve Asmussen’s charge at Del Mar

Here Comes When lands 20-1 surprise in soft-ground Sussex Stakes

O’Brien withdraws Churchill before race due to ‘extreme conditions’

Arrogate claims sensational win in $10m Dubai World Cup

Bob Baffert’s star horse makes up for slow start with storming finish at Meydan

It was a Glorious Goodwood for James McDonald and Dutch Connection

McDonald also steered Thunder Snow to second behind War Decree in Vintage Stakes

Hawkbill gets better of The Gurkha in thrilling Coral-Eclipse

Godolphin claim Sandown Group One race for first time since 2004

My Dream Boat stuns Ascot to take Prince of Wales’s Stakes

Adam Kirby partners 16-1 outsider to victory as Japanese favourite A Shin Hikari flops

California Chrome goes one better with brilliant Dubai run

Real Steel and Postponed take the other big pots at World Cup

Sruthan claims Lincolnshire as Flat season starts at the Curragh

Aussie Valentine gave trainer Paul Deegan one-two in big race

Dermot Weld’s Fascinating Rock takes Champion Stakes

10-1 shot has enough in hand to edge Found and favourite Jack Hobbs at Ascot

Superpowers align for Dewhurst face-off

Coolmore and Godolphin renew rivalry in a ’mouthwatering’ Newmarket highlight

O’Brien aims to bounce back with win at Newmarket

Trainer also targets record-breaking 15th success in Juddmonte stakes at Curragh

Air Force Blue strikes to give Aidan O’Brien another Phoenix Stakes

Trainer has 1-2 in Group One sprint at the Curragh

Richard Hughes makes final fling at King George Stakes

Champion jockey given last chance at Ascot on Eagle Top before his retirement

Jack Hobbs’s impressive win completes great month for John Gosden

Trainer’s notable feat in claiming two historic classes with two different horses

Gosden hopes for rain as Jack Hobbs completes Irish Derby preparations

Newmarket trainer pleased with ante-post favourite’s work

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