The British Flat season stages its final Group 1 race of the season, Saturday’s Racing Post Trophy at Doncaster, in which Aidan O'Brien is responsible for six of the 15 horses.
The master of Ballydoyle has Battle of Marengo, Eye Of The Storm, Festive Cheer, Kingsbarns, Kingston Jamaica and Magician entered at the six-day declaration stage, while Jim Bolger's Autumn Stakes hero Trading Leather and Andrew Oliver's First Cornerstone complete a strong Irish team.
Royal Lodge hero Steeler leads the home defence which also includes the Richard Hannon pair of Havana Gold and Van Der Neer.
Fantastic Moon, who endured a troubled passage through the Royal Lodge, will seek to return to winning ways for Jeremy Noseda while Birdman, Glory Awaits and Sir Patrick Moore complete the field for the one-mile contest (1600m), which is due off at 3.05pm.
Newbury also stages Group-race action on Saturday, in the shape of the Group 3 Horris Hill Stakes at 2.15pm. The seven-furlong (1400m) race for two-year-olds has attracted Dewhurst Stakes runner-up Leitir Mor, who is also entered for the Killavullan Stakes at Leopardstown in Ireland, another Group 3 juvenile contest at 2.40pm.
Newbury’s other Group race is the St Simon Stakes at 2.40pm, when Frankel’s brother Noble Mission could line up.
The Jumps really cranks up a gear on Saturday, with the staging of the Betfred Monet's Garden Old Roan Chase at Aintree.
Noble Prince will cross the Irish Sea to make his seasonal reappearance in the two-and-a-half-mile feature (4000m) at 3.30pm.
The eight-year-old suffered an injury on his final start of the campaign in the Ryanair at the Cheltenham Festival, but trainer Paul Nolan is looking forward to getting him back on the racecourse this weekend.
Nolan said: "He got injured in Cheltenham but we've had no setbacks since and he's as straight as we can get him without having had a run.
“Obviously we'll be looking to run him on better ground this season and we are definitely looking at going up in trip. He'll be in races like the King George and he obviously has to improve, but we'll see how we get on.”
Noble Prince is one of 19 Roan entries - and the sole Irish contender. Champion trainer Paul Nicholls could saddle Poquelin and the progressive Pacha Du Polder. Other notable entries in the Betfred Monet's Garden Old Roan Chase include 2011 Grade 1 totesport Bowl winner Nacarat and last season's Grade 2 Peterborough Chase victor Gauvain, who could have his first start for Hobbs.
High-class novice chaser Notus De La Tour is one of two possibles for David Pipe, while Nick Williams could saddle For Non Stop.