Sunday 20 September 2026 racing: the card at Plumpton, Listowel and Hamilton

The card for Sunday 20 September 2026 runs to three meetings and 21 races: Listowel in Ireland, and Hamilton and Plumpton in Britain. The first race is at Hamilton at 14:00 and the last is at Listowel at 17:18. Listowel has the longest card of the day, and the biggest field on it as well. The feature is the Bob George Powered By Mansell McTaggart Open NH Flat Race at Plumpton, due off at 17:08, and it has the next section to itself. Every runner, with the model's estimated chance beside the market's price, is on the racecards page, and the model's view of the whole day is on the day's predictions; the card was written before the first race, so nothing on it is a result.

The feature: the Bob George Powered By Mansell McTaggart Open NH Flat Race at Plumpton

The model rates Merci Vieil Ami its most likely winner, while the market has Shane's Spirit shortest. The card above sets the model's estimated chance for each runner beside the chance implied by the market, and the gap between the two columns is the only thing the Lab claims to measure; it says which horse the model rates highest and nothing about what to do with that. The race is run over 2m1f169y, on ground declared as Good, with six priced runners. The course itself is covered in the Plumpton guide.

Where the model disagrees with the market

The widest gap between the model's estimate and the market's price on this card is in the Prestige Security Executive Protection Maiden Hurdle at Plumpton (15:08), where the model gives Premier Fantasy a smaller chance than the price implies. The race was chosen by the size of that gap and by nothing else.

A gap is a difference of opinion, and a difference of opinion is all it is: the wide ones tend to fall on runners the model has the least evidence about, as often as on a horse the market has overlooked. The left column is the model's estimated chance, the right is the chance the price implies, and the track record shows how often the model's side of the argument has been right once every pick is settled at starting price.

What the card costs

Every price on the card carries the bookmaker's margin: add up the chances the prices imply and the total comes to more than a whole field, and the excess is what the book keeps whichever horse wins. The table below is the latest published margin for each book the Lab tracks. It is compiled from the previous evening's prices, so it describes the card as it was sold then rather than the morning's board, and the order of the table is a measurement, never a recommendation.

The margin is the reason the Lab's tested strategies lose over time even when a pick is sound; what betting costs has the working, and the Tipster League shows what it does to the AI tipsters over a season.

Elsewhere in the Lab: How Much of My Stake Do the Bookmakers Actually Keep?.

Common questions

Which meetings race on Sunday 20 September 2026?

Listowel in Ireland, and Hamilton and Plumpton in Britain. Every card is on the racecards page with the model's estimated chance beside each runner, and the first race is at Hamilton at 14:00.

When are the model's estimates published?

Each morning before the first race, from the declared runners, and they are not changed after the off. A card labels itself a pre-race estimate once its race has run.

What does the model's chance mean?

The model's own estimate of how likely each runner is to win, set beside the chance the market price implies. It is an opinion with a published record, not a tip, and the track record is where that record lives.

Why is a horse missing from a card?

Either it was withdrawn after the estimates were made, or the race was one the model did not price. The horse tracker follows any runner on the card to its next entry.

How are the AI tipsters doing?

The Tipster League settles every AI pick at starting price and publishes the running total, losses included.

A word on all of this

None of the above is a tip, and no system the Lab has tested has made money over the whole record. Bet only what you can afford to lose. If gambling has stopped being fun, BeGambleAware has free, confidential help.