Skip to content
Jockey profile

Isobelle Chalmers

129 rides in the last 5 seasons · 70 individual horses
As at 12 Nov 2026 · KTB archive: 2005–present, updated daily
Last ride 12 days ago 100% of rides on the flat
Last 5 seasons Lifetime (2024→)
from 1 Jan 2022
6–129
Wins / Runs
4.7%
Strike rate
n=129
24 (19%)
Placed
0.74
Fair A/E
n=127 · 0.74 incl. margin
+49.50
£1 level stake
n=129 at SP · +38.4%
£97,140
Prize money (window)
Strike by season
4.7%
KTB Rider Profile

Rides around 30 times a season, almost all on the flat, winning on 5% of them — a touch below the margin-free market read across five seasons (Fair A/E 0.74). First rides on a horse are a strength: 7% on the first captured pairing (70 rides).

Deterministic profile computed from 129 archived runs (last 5 seasons) · updated 12 Nov 2026
KTB at a glance First rides: 7.1% Claiming: 4.8%
The read

The rider also reads well in Class 5 (8.1%, n=37). The market has consistently overbet the rider off a 15-30-day break: Fair A/E 0.36 across 54 rides (1.9% strike, −48.50 to a £1 stake) — runners there underperform what the price implies.

Written from the figures on this page — every claim carries its sample. Descriptive, not a tip.

Riding patterns

the angles behind the record · vs 4.7% baseline
First ride on the horse · first captured pairing
7.1%+2.4
n=70 · A/E 1.47 · £1 +91.50
Last-time-out winners · previous run was a win
25%+20.3
n=8 · A/E 2.43 · £1 +12.00
Fresh horses · 61+ days off
16.7%+12.0
n=18 · A/E 5.17 · £1 +135.00
Claiming rides · riding with a claim
4.8%+0.1
n=126 · A/E 0.78 · £1 +52.50
Big fields · 14+ runners
0%−4.7
n=10 · A/E 0.00 · £1 −10.00

Each tile is the record in that situation vs the 4.7% baseline — descriptive splits with the sample always shown, for you to weigh. Tiles under 30 runs render muted. First rides are the first captured pairing of horse and rider; last-time-out winners are horses whose previous captured run was a win; claiming rides are runs where the rider carried a weight claim. Group / Graded covers pattern and listed races.

Notable angles

vs their own baseline
In Class 5 8.1% vs 4.7% · n=37
Off a 15-30-day break 1.9% vs 4.7% · n=54
On first rides for the horse 7.1% vs 4.7% · n=70
In Class 6 3% vs 4.7% · n=66 · A/E 0.50
Over 1m – 1m1f 6.7% vs 4.7% · n=30
Descriptive splits ranked by divergence × sample — insight, not instruction. Every angle carries its N; nothing under 30 runs qualifies. Rows within 2pts of the baseline appear only when the market-relative read (Fair A/E) diverges, and show it.

Record by conditions

same window as header

Going

GoingRWSR£1
Standard (AW) 61 3 4.9% +92.00
Good 20 1 5% −14.50
Good to Firm 16 0 0% −16.00
Soft 11 2 18.2% +9.00
Good to Soft 10 0 0% −10.00
Heavy 7 0 0% −7.00
Firm 4 0 0% −4.00

Courses

CourseRWSR£1
Lingfield (AW) 20 3 15% +133.00
Bath 18 0 0% −18.00
Kempton (AW) 18 0 0% −18.00
Wolverhampton (AW) 11 0 0% −11.00
Brighton 8 1 12.5% +3.00
Chelmsford City (AW) 8 0 0% −8.00
Salisbury 7 1 14.3% −1.50
Chepstow 5 0 0% −5.00
Southwell (AW) 4 0 0% −4.00
Chester 4 0 0% −4.00
Ffos Las 4 0 0% −4.00
Windsor 3 0 0% −3.00
Nottingham 3 0 0% −3.00
Goodwood 3 0 0% −3.00
Newmarket 3 0 0% −3.00

Class

ClassRWSR£1
Class 6 66 2 3% −38.00
Class 5 37 3 8.1% +103.50
Class 4 13 1 7.7% −3.00
Class 2 6 0 0% −6.00
Class 3 3 0 0% −3.00

Market position

In the bettingRWSRA/E£1
Favourite 3 0 0% 0.00 −3.00
2nd–3rd fav 9 2 22.2% 0.74 +6.50
4th–6th fav 43 3 7% 0.96 −6.00
7th+ in betting 74 1 1.4% 0.59 +52.00
Fair A/E per band is the tell: near 1.00 the market had it priced right; well above, the wins came where the market didn't expect them.

Rows below n=30 are shown faded — a small sample is a fact, not a trend. Every figure carries its N.

Horses ridden

same window as header · most-raced first
HorseRWPlLast ran
Ashford Hill (GB) 21 2 4 5 Oct 26
Little Miss Magic (IRE) 12 0 3 26 Feb 26
Mybad (IRE) 4 0 0 4 Sep 25
Magical Life (GB) 3 0 1 31 Oct 26
Thiscouldbefun (IRE) 3 1 1 29 Oct 26
Cuban Lady (GB) 3 0 1 7 Oct 26
Grimese's Special (IRE) 3 0 0 21 Sep 26
Fact Or Fable (IRE) 3 0 0 30 Oct 25
Sun Dancer Girl (FR) 3 0 1 13 Feb 25
Gooloogong (IRE) 2 0 1 10 Oct 26
Shipshape (IRE) 2 0 2 2 Oct 26
Sassy (A) 2 0 0 29 Sep 26
Showing the 60 most-raced of the 70 horses ridden in this window — each ran at least 1 time. Horses with fewer runs aren't listed; search finds any horse since 2005. Runs, wins and places only: a strike rate or a return on a handful of runs is noise, so none is quoted per horse — each horse's full record is on its own page.

Current form

significance-gated

Last 14 days

Small sample
0 from 1
Only 1 rides in the last 14 days — too few to read against the baseline (gate: n≥15). The card states the sample and stays neutral.

By month

strike by month, 5 seasons
JFMAMJJASOND
100000001044200
A flat rider: the season runs Mar–Oct. Muted months are small samples (under 30 runs) — read them with the caution they deserve.

Riding for

same window · biggest samples first
TrainerRWSR£1
Dominic Ffrench Davis 25 3 12% +129.00
J S Moore 20 1 5% −14.50
Patrick Chamings 15 0 0% −15.00
Andrew Balding 12 1 8.3% −2.00
Simon Hodgson 8 0 0% −8.00
Bernard Llewellyn 6 0 0% −6.00
Lisa Williamson 3 0 0% −3.00
Scott Dixon 3 0 0% −3.00
Steve Blackwell 3 0 0% −3.00
Michael Madgwick 2 0 0% −2.00
Luke Dace 2 0 0% −2.00
Edward Smyth-Osbourne 2 0 0% −2.00
Muted rows are under 30 rides.

Career highlights

lifetime archive, 2024→
6
Archived wins
£97,140
Prize money
2026
Best season · 3 wins
Izakaya (GER) — Watch Weekend Winners Powered By BetVictor 'Hands And Heels' Apprentice Handicap Newbury · Oct 2025 · Class 5
£5,757
Floating Market (GB) — Celebrate National Racehorse Week Restricted Novice Stakes (For Horses In Bands C And D) (GBB Race) Lingfield (AW) · Aug 2026 · Class 4
£5,400
Ashford Hill (GB) — BetMGM Supports Safer Gambling Handicap (Div 2) Lingfield (AW) · Jan 2026 · Class 6
£4,711
Notable horses
Ashford Hill (GB) Thiscouldbefun (IRE) Floating Market (GB) Izakaya (GER) James Park Woods (IRE)

Sires of the horses ridden

progeny record · win % by ground and trip
Massaat (IRE) 9.5% · 2–21
Progeny have won 7.7% of 1,223 runs since 2022 (125 horses). Weakest on Good to Soft going: 4.4% from 113. Weakest over 1m2f – 1m4f (all codes): 3.7% from 134.
Calyx (GB) 0% · 0–12
Progeny have won 13.5% of 1,524 runs since 2023 (175 horses). Weakest on Good to Soft going: 9.3% from 172. Weakest at trips under 6f (all codes): 9.9% from 111.
Awtaad (IRE) 0% · 0–4
Progeny have won 11.5% of 2,890 runs since 2020 (210 horses). Weakest on Heavy going: 7.7% from 104. Weakest over 2m1f – 2m4f (all codes): 6% from 117.
Havana Grey (GB) 0% · 0–4
Progeny have won 13.2% of 4,612 runs since 2022 (420 horses). Strongest over 1m2f – 1m4f (all codes): 16.2% from 105. Weakest over 1m – 1m1f (all codes): 9.9% from 424.
Soldier's Call (GB) 0% · 0–4
Progeny have won 9.1% of 2,131 runs since 2023 (218 horses). Strongest on Good to Soft going: 13.5% from 200. Weakest over 1m – 1m1f (all codes): 4% from 248.
Alhebayeb (IRE) 0% · 0–3
Progeny have won 8.3% of 2,639 runs since 2018 (160 horses). Strongest on Heavy going: 11.7% from 179. Strongest over 1m5f – 2m (all codes): 11.5% from 253.
Top line: the rider's own record with each sire's runners (win %, wins–runs), same window as the header; faded under 30 runs. Beneath it: every run by that sire's progeny in our archive since 2008, as at 12 Nov 2026 — what they have done, not a forecast. A going or a distance is named only where at least 100 progeny runs sit 3 or more points from the sire's own win rate. Distance bands cover Flat and jumps together.

The record

latest 50 of 129 · newest first

The latest 50 of 129 archived rides, newest first. The full record runs from 16 June 2024 to 31 October 2026.

DateCourseHorseRaceFinishSP
31 Oct 26 Newmarket Magical Life (GB)T: J. S. Moore Idee 158. German Derby In Hamburg Nursery Handicap StakesClass 5 · 9f · Good To Soft · 10 ran 8th 12/1
29 Oct 26 Bath Thiscouldbefun (IRE)T: J. S. Moore Disability Inc Handicap StakesClass 6 · 8f · Soft · 14 ran 14th 11/1
27 Oct 26 Wolverhampton (AW) Bennyworth (IRE)T: Jim Boyle All Weather Championship Is Back "Hands And Heels" Apprentice Handicap Stakes (Part Of The Racing Excellence Series)Class 6 · 8.5f · Standard · 10 ran 6th 22/1
26 Oct 26 Kempton (AW) Lunario (IRE)T: Luke Dace Unibet 40,000+ Live Streamed Events Handicap StakesClass 4 · 7f · Standard / Slow · 12 ran 3rd 66/1
19 Oct 26 Bath Magical Life (GB)T: J. S. Moore Wiltshire And Bath Air Ambulance Nursery Handicap StakesClass 5 · 8f · Good To Soft · 13 ran 2nd 22/1
14 Oct 26 Kempton (AW) Magical Life (GB)T: J. S. Moore Try Unibet's New Improved Acca Boosts Nursery Handicap Stakes (GBBPlus Race)Class 4 · 8f · Standard / Slow · 7 ran 7th 100/1
12 Oct 26 Kempton (AW) Hopjes (SAF)T: Harriet Dickin Unibet More Extra Place Races Handicap StakesClass 6 · 6f · Standard / Slow · 10 ran 7th 28/1
10 Oct 26 Newmarket Gooloogong (IRE)T: George Baker Club Godolphin Cesarewitch Handicap Stakes (Heritage Handicap) (GBBPlus Race)Class 2 · 18f · Good · 29 ran 9th 40/1
08 Oct 26 Bath Aloof (A)T: Steve Blackwell Spillers ULCA Fibre Handicap Stakes (0-55) - Arab Race10f · Good · 5 ran 5th 12/1
07 Oct 26 Kempton (AW) Cuban Lady (GB)T: Patrick Chamings Try Unibet's New Improved Acca Boosts Apprentice Handicap StakesClass 5 · 7f · Standard / Slow · 8 ran 6th 16/1
06 Oct 26 Brighton King of The Dance (IRE)T: Bernard Llewellyn Follow Matchbook On X Handicap StakesClass 6 · 8f · Good To Firm · 10 ran 8th 3/1J
06 Oct 26 Brighton Private Project (IRE)T: Pat Phelan Matchbook Signup - Get 20% Back On Losses Apprentice Handicap Stakes (Hands And Heels Race) (Part Of The Racing Excellence Series)Class 6 · 10f · Good To Firm · 9 ran 3rd 4/1J
05 Oct 26 Kempton (AW) Ashford Hill (GB)T: Dominic Ffrench Davis Set Your Limits With Unibet Handicap StakesClass 6 · 7f · Standard / Slow · 13 ran 11th 33/1
02 Oct 26 Ascot Shipshape (IRE)T: Bernard Llewellyn Melbourne Cup Carnival Handicap Stakes (GBBPlus Race)Class 3 · 16f · Good To Firm · 5 ran 2nd 6/1
29 Sep 26 Bath Sassy (A)T: Steve Blackwell Carbonnetzero Handicap Stakes (Arab Race)10f · Good To Firm · 6 ran 5th 11/1
28 Sep 26 Brighton Allaboutthelunch (GB)T: Edward Smyth-Osbourne Follow Matchbook On X Nursery Handicap StakesClass 6 · 8f · Good To Firm · 13 ran 10th 15/2
24 Sep 26 Southwell (AW) Floating Market (GB)T: Andrew Balding Sky Sports Racing Sky 415 Fillies' Handicap StakesClass 5 · 11f · Standard · 12 ran 6th 11/1
22 Sep 26 Beverley Soham's Roger (GB)T: Neil Mechie Churchill Tyres Apprentice Handicap StakesClass 6 · 10f · Good · 12 ran 11th 100/1
21 Sep 26 Ffos Las Mick The Hat (IRE)T: Bernard Llewellyn Dandara Apprentice Handicap StakesClass 6 · 10f · Soft · 9 ran 8th 16/1
21 Sep 26 Ffos Las Grimese's Special (IRE)T: J. S. Moore Rhn Travel Handicap Stakes (Div I)Class 6 · 8f · Soft · 9 ran 6th 12/1

Drawn from the whole archive (2005 onwards), so it can include runs outside the window the header statistics cover. Non-runners are not listed. A finish shown in letters is a non-completion (F fell · UR unseated · PU pulled up · BD brought down).

KTB’s figures

the forward record · since 5 Oct 2026

KTB’s figures on this rider’s mounts since 7 Oct 2026: fastest on KTB Speed in 2 runs (won 0) · to 31 Oct 2026.

Each pick was a KTB figure’s choice before the off — the published KTB Selection, the top-rated horse on KTB Rating, the fastest on KTB Speed — settled against the result the next morning and never worked out again; “did not run” is counted apart. GB and Irish races only. A record of weeks so far: read it as a count, not a verdict.

Quick answers

What is Isobelle Chalmers's strike rate?
Isobelle Chalmers has won 6 of 129 rides since 2022, a strike rate of 4.7% (as at 12 November 2026). Figures are computed from our own results archive.
Is Isobelle Chalmers in form?
Too few rides in the last 14 days to read — 1 ride, which is not a sample we will draw a conclusion from.
What is Isobelle Chalmers's Fair A/E?
0.74, from 127 rides with a computed fair probability since 2022. Fair A/E compares actual wins with a margin-stripped market expectation, so 1.00 is par: above it the wins came at bigger prices than the margin-free market implied, below it they did not.
Fair A/E compares wins with a margin-stripped market expectation. Favourite-heavy samples — top yards, leading riders — naturally read a few points warm, so 1.05 means "beat the margin-free market read", not "the market underrates this by 5%". Three sample sizes are reported and never blended: runs (n), the ROI basis (n at SP), and the fair-A/E basis (n with a computed fair probability).

Strike rate is wins over all runs (n). ROI is £1 level stakes at SP over runs with a parseable price (n at SP). Fair A/E is wins over margin-stripped market expectation, over runs with a computed fair probability (n fair). The three Ns can legitimately differ and are always shown. Figures as at 12 November 2026, computed from our own results archive (2005 onwards; aggregates from 2008).