Skip to content
Trainer profile

Deborah Sanderson

368 runners in the lifetime window · 55 individual horses
As at 15 Oct 2026 · KTB archive: 2005–present, updated daily
Last runner Jun 2016 100% of runners on the flat
Last 5 seasons Lifetime (2009→)
No runners in the last 5 seasons — showing the lifetime record, from 1 Jan 2008 — the aggregate floor: every horse in the window has a complete captured career behind it.
32–368
Wins / Runs
8.7%
Strike rate
n=368
102 (28%)
Placed
1.01
Fair A/E
n=365 · 0.87 incl. margin
+35.69
£1 level stake
n=368 at SP · +9.7%
£151k
Prize money (window)
Strike by season
3.7%
KTB Yard Profile

Sent out around 50 runners a season, almost all on the flat, winning with 9% of them — level with the margin-free market read across the lifetime window (Fair A/E 1.01).

Deterministic profile computed from 368 archived runs (lifetime window) · updated 15 Oct 2026
KTB at a glance Silvestre De Sousa: 12% from 50
The read

The record is strongest at Catterick (13.3%, n=30), clear of the yard's 8.7% baseline. New recruits from other stables on their first run struggle at 0% (n=35, Fair A/E 0.00). Silvestre De Sousa rode 14% of the entries and edges the yard's average (12% vs 8.7%, A/E 0.96). The yard also read well on Good to Firm going (13.5%, n=96) and off a 8-14-day break (12.2%, n=90). The record read poorly off a break of 180+ days — 0% over 35 runners, 8.7pts below the baseline. The market has consistently overbet the yard at trips under 6f: Fair A/E 0.62 across 71 runners (5.6% strike, −16.00 to a £1 stake) — runners there underperformed what the price implied. The stable star of the record was Prigsnov Dancer (IRE) — 6 wins from 53 runs for the yard.

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

Yard patterns

the angles behind the record · vs 8.7% baseline
Fresh · 61+ days off
3.3%−5.4
n=61 · A/E 0.55 · £1 −25.27
New recruits · first run for the yard
0%−8.7
n=35 · A/E 0.00 · £1 −35.00
Debutants · first career start
0%−8.7
n=21 · A/E 0.00 · £1 −21.00
First-time headgear · true-first definition
0%−8.7
n=15 · A/E 0.00 · £1 −15.00
Headgear returns · back on after a bare run
10%+1.3
n=10 · A/E 1.70 · £1 +16.00
When favourite
22.2%
n=27 · A/E 0.79 · £1 −12.81
Claiming riders · a claimer in the saddle
7.3%−1.4
n=164 · A/E 0.88 · £1 +3.23
Group / Graded races · pattern & listed
0%−8.7
n=1 · A/E 0.00 · £1 −1.00

Each tile is the record in that situation vs the 8.7% baseline — descriptive splits with the sample always shown, not tips. Tiles under 30 runs render muted. Headgear figures use the true-first definition (first gear appearance in the captured career); returns are gear back on after a bare run. Claiming riders are runs where the booked rider carried a weight claim. Group / Graded covers pattern and listed races.

Notable angles

vs their own baseline
Off a break of 180+ days 0% vs 8.7% · n=35
With new recruits 0% vs 8.7% · n=35
On Good to Firm going 13.5% vs 8.7% · n=96
Off a 8-14-day break 12.2% vs 8.7% · n=90
At Catterick 13.3% vs 8.7% · n=30
At trips under 6f 5.6% vs 8.7% · n=71
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) 139 11 7.9% +76.00
Good to Firm 96 13 13.5% −21.04
Good 63 6 9.5% +8.73
Good to Soft 37 2 5.4% +5.00
Soft 27 0 0% −27.00
Firm 4 0 0% −4.00
Heavy 2 0 0% −2.00

Courses

CourseRWSR£1
Wolverhampton (AW) 69 5 7.2% +49.00
Southwell (AW) 48 5 10.4% +23.00
Beverley 35 3 8.6% +13.00
Catterick 30 4 13.3% −9.00
Doncaster 28 0 0% −28.00
Nottingham 20 3 15% +20.88
Leicester 17 3 17.6% +7.83
Redcar 16 1 6.3% −10.50
Kempton (AW) 16 1 6.3% +10.00
Thirsk 13 2 15.4% +18.00
Newcastle 11 0 0% −11.00
Pontefract 10 0 0% −10.00
Hamilton 9 2 22.2% +1.00
Ripon 8 1 12.5% −5.75
Yarmouth 6 0 0% −6.00

Class

ClassRWSR£1
Class 6 162 17 10.5% +83.06
Class 5 134 9 6.7% −48.37
Class 4 60 5 8.3% +2.00
Class 2 5 0 0% −5.00
Class 3 4 0 0% −4.00
Class 7 2 1 50% +9.00
Class 1 1 0 0% −1.00

Market position

In the bettingRWSRA/E£1
Favourite 31 7 22.6% 0.83 −12.31
2nd–3rd fav 57 11 19.3% 1.23 +5.00
4th–6th fav 109 3 2.8% 0.36 −52.00
7th+ in betting 171 11 6.4% 1.88 +95.00
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 trained

same window as header · most-raced first
HorseRWPlLast ran
Prigsnov Dancer (IRE)from Frank Sheridan · then John Balding 53 6 17 3 Jun 16
Roger Thorpe (GB)from Garry Woodward · then John Balding 29 3 12 8 Jun 16
Night Trade (IRE)then Ronald Harris 28 4 13 7 Aug 11
Munaawib (GB)from David C Griffiths · then Ray Peacock 22 2 5 2 Apr 16
Kheylide (IRE)from Miss V Haigh · then Daniel O'Brien 16 1 4 17 Oct 09
Diamond Runner (IRE)from Hugo Palmer · then John Norton 15 2 7 20 May 16
Nine Before Ten (IRE) 13 2 5 13 Dec 14
All The Nines (IRE)from Miss V Haigh 12 5 6 16 Jun 10
Happy Anniversary (IRE)from Miss V Haigh · then R Donohoe 12 0 5 13 Jun 10
Smirfy's Silver (GB)from Ed McMahon · then Michael Mullineaux 10 1 4 11 Oct 11
Piccoluck (GB)then Amy Weaver 10 0 4 17 May 11
Plenty O'toole (GB) 10 0 1 23 Nov 10
All 55 horses sent out in this window. 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.
Where they came from · where they went next

Of the 55 horses listed, 34 arrived from another yard in our archive, most often from Miss V Haigh (9) and George Foster (5); 21 had their first archived run for this yard.

34 have since run for another yard, most often for Garry Moss (4) and David C Griffiths (3); 21 have no later run for another yard in our archive.

Read from each listed horse's whole archived career (2005 onwards), not only this window, and counted over the horses listed above, not the whole string. “First archived run” means our archive holds nothing earlier, not that the horse was unraced. A horse with no later run elsewhere may still be here, be off the track, or have run somewhere our archive does not cover — none of that is asserted.

When the yard fires

strike by month, lifetime
JFMAMJJASOND
50051485177986
A flat yard: the season runs Mar–Oct. Muted months are small samples (under 30 runs) — read them with the caution they deserve.

Jockey bookings

same window · biggest samples first
Go-to riderSilvestre De Sousa
14% of all rides
12% SR · A/E 0.96
RiderRWSR£1
Silvestre De Sousa 50 6 12% −4.87
Muted rows are under 30 rides and sit behind "Show all".

Career highlights

lifetime archive, 2009→
32
Archived wins
£151k
Prize money
2010
Best season · 7 wins
All The Nines (IRE) — Weatherbys Bank Handicap Hamilton · May 2009 · Class 4
£7,447
All The Nines (IRE) — Brandon Homes William Wallace Handicap Hamilton · May 2009 · Class 4
£6,476
All The Nines (IRE) — Best Odds Guaranteed At Ladbrokes.com Fillies' Handicap Wolverhampton (AW) · May 2010 · Class 4
£5,181
Notable horses
Prigsnov Dancer (IRE) All The Nines (IRE) Night Trade (IRE) Roger Thorpe (GB) Munaawib (GB) Diamond Runner (IRE)

Sires in the string

progeny record · win % by ground and trip
Namid (GB) 11.3% · 6–53
Progeny have won 8.2% of 4,102 runs since 2008 (276 horses). Weakest on Heavy going: 2.4% from 164. Weakest over 1m5f – 2m (all codes): 0.8% from 119.
Firebreak (GB) 10.3% · 3–29
Progeny have won 8.4% of 2,474 runs since 2008 (150 horses).
Trade Fair (GB) 14.3% · 4–28
Progeny have won 9.6% of 2,230 runs since 2008 (113 horses).
Haafhd (GB) 9.1% · 2–22
Progeny have won 11% of 4,748 runs since 2008 (305 horses).
Piccolo (GB) 0% · 0–18
Progeny have won 7.8% of 6,904 runs since 2008 (393 horses). Strongest on Firm going: 11.6% from 164. Weakest over 1m5f – 2m (all codes): 3.5% from 258.
Kheleyf (USA) 6.3% · 1–16
Progeny have won 8.7% of 10,540 runs since 2008 (676 horses). Strongest on Firm going: 12.2% from 131. Weakest over 1m2f – 1m4f (all codes): 5.6% from 879.
Top line: the yard'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 15 Oct 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 368 · newest first

The latest 50 of 368 archived runners, newest first. The full record runs from 23 April 2009 to 8 June 2016.

DateCourseHorseRaceFinishSP
08 Jun 16 Beverley Roger Thorpe (GB)J: Cam Hardie Beverley Folk Festival Here Next Week HandicapClass 5 · 7.5f · Good To Firm · 12 ran 6th 5/1
03 Jun 16 Catterick Prigsnov Dancer (IRE)J: Rowan Scott Free Month Trial Racing UK HandicapClass 6 · 6f · Good To Firm · 11 ran 3rd 28/1
20 May 16 Wolverhampton (AW) Diamond Runner (IRE)J: Ben Sanderson Mr Herman Bosman Senior Memorial Apprentice HandicapClass 6 · 8.5f · Standard · 12 ran 12th 8/1
19 May 16 Ripon Roger Thorpe (GB)J: Marc Monaghan Sharow Apprentice HandicapClass 6 · 8f · Good · 14 ran 2nd 7/2F
07 May 16 Nottingham Roger Thorpe (GB)J: Ben Sanderson Genting Casino Nottingham Apprentice Training Series Handicap (Div 2)Class 6 · 8.5f · Good To Firm · 6 ran 3rd 3/1J
07 May 16 Nottingham Diamond Runner (IRE)J: Ben Sanderson Genting Casino Nottingham Apprentice Training Series Handicap (Div 1)Class 6 · 8.5f · Good To Firm · 8 ran 6th 7/1
03 May 16 Catterick Prigsnov Dancer (IRE)J: Noel Garbutt Don't Miss Saturday 28th May HandicapClass 5 · 5f · Good To Soft · 7 ran 4th 25/1
02 May 16 Beverley Roger Thorpe (GB)J: Paddy Pilley Racing Again On Tuesday 10 May Handicap (Div 1)Class 5 · 7.5f · Good · 11 ran 3rd 14/1
27 Apr 16 Wolverhampton (AW) Diamond Runner (IRE)J: Cameron Noble HS Butyl Apprentice HandicapClass 6 · 8.5f · Standard · 6 ran 4th EvensF
23 Apr 16 Wolverhampton (AW) Roger Thorpe (GB)J: Jack Duern #FollowUs On Twitter At WolvesRaces HandicapClass 6 · 8.5f · Standard · 12 ran 7th 12/1
23 Apr 16 Wolverhampton (AW) Diamond Runner (IRE)J: Ben Sanderson #FollowUs On Twitter At WolvesRaces HandicapClass 6 · 8.5f · Standard · 12 ran 1st 33/1
18 Apr 16 Pontefract Absolutely Awesome (GB)J: J F Egan Douglas Barraclough 80th Birthday Novice StakesClass 5 · 5f · Soft · 8 ran 4th 8/1
16 Apr 16 Nottingham Prigsnov Dancer (IRE)J: Ben Sanderson 1st Security Apprentice HandicapClass 6 · 5f · Soft · 8 ran 6th 10/1
03 Apr 16 Doncaster Siege Of Boston (IRE)J: J F Egan Betfred 'Home Of Goals Galore' Maiden Stakes (Div 1)Class 5 · 7f · Soft · 8 ran 4th 5/1
02 Apr 16 Doncaster Munaawib (GB)J: Ben Sanderson Harriet De-Vere Powell Apprentice Handicap (Go Racing In Yorkshire Future Stars Apprentice Series) (Div 2)Class 5 · 10f · Soft · 16 ran 15th 50/1
02 Apr 16 Doncaster Absolutely Awesome (GB)J: J F Egan Betway Brocklesby Conditions Stakes (Plus 10)Class 4 · 5f · Soft · 10 ran 5th 12/1
22 Mar 16 Southwell (AW) Basil Bear (GB)J: Adam Beschizza Ladbrokes Median Auction Maiden StakesClass 5 · 8f · Standard · 7 ran 7th 100/1
15 Mar 16 Southwell (AW) Roger Thorpe (GB)J: Paddy Pilley Ladbrokes HandicapClass 6 · 7f · Standard · 9 ran 6th 8/1
26 Feb 16 Wolverhampton (AW) Prigsnov Dancer (IRE)J: Ben Sanderson Unibet Offer Daily Jockey/Trainer Specials Apprentice HandicapClass 7 · 6f · Standard · 11 ran 7th 10/1
12 Feb 16 Wolverhampton (AW) Prigsnov Dancer (IRE)J: Paddy Pilley Download The New Unibet Racing App Handicap (Div 1)Class 6 · 6f · Standard · 12 ran 4th 25/1

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).

Quick answers

What is Deborah Sanderson's strike rate?
Deborah Sanderson has won 32 of 368 runners since 2008, a strike rate of 8.7% (as at 15 October 2026). Figures are computed from our own results archive.
Which course does Deborah Sanderson do best at?
Catterick by strike rate: 4 wins from 30 runners (13.3%) since 2008. Read from the 15 courses with the most runners on the same basis, and only those with at least 30 — a small sample cannot top the list, and a rarely-visited course is not in the comparison.
Who rides most for Deborah Sanderson?
Silvestre De Sousa, with 50 runners since 2008 — 14% of the total. That pairing has won 6 (12%).
What is Deborah Sanderson's Fair A/E?
1.01, from 365 runners with a computed fair probability since 2008. 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 15 October 2026, computed from our own results archive (2005 onwards; aggregates from 2008).