Skip to content
Trainer profile

I M Mason

21 runners in the lifetime window · 8 individual horses
As at 22 Oct 2026 · KTB archive: 2005–present, updated daily
Last runner Apr 2018 100% of runners over jumps
Last 5 seasons Lifetime (2010→)
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.
1–21
Wins / Runs
4.8%
Strike rate
n=21
8 (38%)
Placed
0.40
Fair A/E
n=21 · 0.35 incl. margin
−16.50
£1 level stake
n=21 at SP · −78.6%
£6,311
Prize money (window)
Strike by season
0%

Small sample — fewer than 30 runs in this window. Read the Ns before the percentages.

Yard patterns

the angles behind the record · vs 4.8% baseline
Fresh · 61+ days off
0%−4.8
n=13 · A/E 0.00 · £1 −13.00
New recruits · first run for the yard
0%−4.8
n=7 · A/E 0.00 · £1 −7.00
Debutants · first career start
0%−4.8
n=1 · A/E 0.00 · £1 −1.00
First-time headgear · true-first definition
0%−4.8
n=1 · A/E 0.00 · £1 −1.00
When favourite
0%
n=3 · A/E 0.00 · £1 −3.00
Claiming riders · a claimer in the saddle
5.6%+0.8
n=18 · A/E 0.43 · £1 −13.50

Each tile is the record in that situation vs the 4.8% 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.

Record by conditions

same window as header

Race type

TypeRWSR£1
Chase 20 1 5% −15.50
NH Flat 1 0 0% −1.00

Going

GoingRWSR£1
Good 12 0 0% −12.00
Good to Firm 4 1 25% +0.50
Soft 3 0 0% −3.00
Good to Soft 2 0 0% −2.00

Courses

CourseRWSR£1
Cheltenham 5 0 0% −5.00
Southwell 3 0 0% −3.00
Hexham 3 1 33.3% +1.50
Sedgefield 2 0 0% −2.00
Stratford 2 0 0% −2.00
Catterick 2 0 0% −2.00
Wetherby 1 0 0% −1.00
Cartmel 1 0 0% −1.00
Aintree 1 0 0% −1.00
Market Rasen 1 0 0% −1.00

Class

ClassRWSR£1
Class 6 10 1 10% −5.50
Class 4 7 0 0% −7.00
Class 3 2 0 0% −2.00
Class 2 1 0 0% −1.00
Class 5 1 0 0% −1.00

Market position

In the bettingRWSRA/E£1
Favourite 4 0 0% 0.00 −4.00
2nd–3rd fav 6 0 0% 0.00 −6.00
4th–6th fav 4 1 25% 2.59 +0.50
7th+ in betting 7 0 0% 0.00 −7.00
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.

Jumping record

completion over obstacles · same window as header
90% completed · 20 obstacle runners (chases & hurdles)
CodeRCompFURPUBDOth
Chase 20 90% 0 0 2 0 0
Chases and hurdles only — bumpers have no obstacles, so completion is not a question there. F fell · UR unseated rider · PU pulled up · BD brought down · Oth covers refusals, slip-ups, run-outs and the rare disqualification. Non-runners are excluded throughout. Rows under n=30 are shown faded. A descriptive record, not a tip.

Horses trained

same window as header · most-raced first
HorseRWPlLast ran
Poppy Day (GB)from Michael Easterby 6 0 2 30 Apr 14
Impact Zone (GB)from Michael Easterby 5 1 4 7 Jun 13
Comedinewithme (GB)from Jamie Snowden 3 0 1 8 Mar 17
Sam's Treasure (GB) 2 0 0 23 Apr 18
Green Du Ciel (FR)from Tim Vaughan · then Brian Barr 2 0 0 14 May 13
Keki Buku (FR)from Philip Hobbs 1 0 0 28 May 15
Oriel Bank (IRE)from Michael Easterby 1 0 0 1 May 13
Chip N Pin (GB)from Tim Easterby 1 0 1 4 Jun 12
All 8 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 8 horses listed, 7 arrived from another yard in our archive, most often from Michael Easterby (3); 1 had its first archived run for this yard.

1 has since run for another yard; 7 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.

Jockey bookings

same window · biggest samples first
RiderRWSR£1
Joanna Mason 15 1 6.7% −10.50
Mr George Smith 4 0 0% −4.00
Mr John Dawson 1 0 0% −1.00
Miss Catherine Walton 1 0 0% −1.00
Muted rows are under 30 rides.

Career highlights

lifetime archive, 2010→
1
Archived wins
£6,311
Prize money
2012
Best season · 1 win
Impact Zone (GB) — Ramside Hotels Heart Of All England Maiden Hunters' Chase Hexham · May 2012 · Class 6
£1,373
Notable horses
Impact Zone (GB)

Sires in the string

progeny record · win % by ground and trip
Bal Harbour (GB) 0% · 0–6
Progeny have won 8.7% of 183 runs since 2008 (17 horses).
Erhaab (USA) 16.7% · 1–6
Progeny have won 8% of 1,060 runs since 2008 (86 horses).
Milan (GB) 0% · 0–3
Progeny have won 11.3% of 16,848 runs since 2008 (1,463 horses).
Black Sam Bellamy (IRE) 0% · 0–2
Progeny have won 10.3% of 4,682 runs since 2008 (466 horses). Weakest over 1m2f – 1m4f (all codes): 5.5% from 145.
Smadoun (FR) 0% · 0–2
Progeny have won 12.2% of 1,394 runs since 2008 (154 horses). Weakest over 1m2f – 1m4f (all codes): 8% from 187.
Definite Article (GB) 0% · 0–1
Progeny have won 10.5% of 5,617 runs since 2008 (527 horses). Weakest on Standard (AW) going: 5.1% from 138. Weakest over 1m2f – 1m4f (all codes): 4.3% from 211.
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 22 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

all 21 archived runs · newest first

Every one of I M Mason's 21 archived runners, from 1 May 2010 to 23 April 2018, newest first — one winner among them.

DateCourseHorseRaceFinishSP
23 Apr 18 Sedgefield Sam's Treasure (GB)J: Mr John Dawson South Durham PTP Here 27 May Novices' Hunters' ChaseClass 6 · 19.5f · Good · 11 ran 7th 25/1
08 Mar 17 Catterick Comedinewithme (GB)J: Mr George Smith John Wade Skip Hire Novices' Hunters' ChaseClass 6 · 25f · Soft · 7 ran 4th 7/2
13 May 16 Aintree Sam's Treasure (GB)J: Mr George Smith Goffs Spring Sales 'Point-To-Point' Bumper (Standard NH Flat Race For Amateur Riders)Class 3 · 17f · Good To Firm · 14 ran 12th 20/1
27 Apr 16 Cheltenham Comedinewithme (GB)J: Mr George Smith Centaur Party With Greg James Tonight Mares' Hunters' ChaseClass 4 · 25.5f · Good · 7 ran 3rd 5/2J
09 Mar 16 Catterick Comedinewithme (GB)J: Mr George Smith John Wade Skip Hire Novices' Hunters' ChaseClass 6 · 25f · Soft · 6 ran 2nd 4/1
28 May 15 Wetherby Keki Buku (FR)J: Miss Catherine Walton Download Your Racing Uk App Open Hunters' ChaseClass 6 · 19.5f · Good · 10 ran PU 8/1
30 Apr 14 Cheltenham Poppy Day (GB)J: Joanna Mason Thank You Gareth Evans Open Hunters' ChaseClass 4 · 32.5f · Good To Soft · 17 ran 10th 66/1
07 Jun 13 Stratford Impact Zone (GB)J: Joanna Mason Aga Ladies Open Point-To-Point Championship Final (Lady Riders' Hunters' Chase)Class 4 · 27.5f · Good · 11 ran 3rd 14/1
14 May 13 Southwell Impact Zone (GB)J: Joanna Mason tfrost.co.uk Suppliers To Horse Racing Open Hunters' ChaseClass 6 · 24f · Good · 7 ran 2nd 8/1
14 May 13 Southwell Green Du Ciel (FR)J: Joanna Mason Savills Open Hunters' Chase (Midlands Point-To-Point Area)Class 5 · 20.5f · Good · 9 ran PU 25/1
01 May 13 Cheltenham Oriel Bank (IRE)J: Joanna Mason Connolly's Red Mills Intermediate Point-to-point Championship Final Hunters' ChaseClass 4 · 25.5f · Good · 17 ran 11th 100/1
05 Apr 13 Sedgefield Green Du Ciel (FR)J: Joanna Mason Rita Crossley's Retirement Novices' Hunters' ChaseClass 6 · 19.5f · Good To Soft · 12 ran 5th 8/1
04 Jun 12 Cartmel Chip N Pin (GB)J: Joanna Mason Fraser Cup Maiden Hunters' Chase (For The Fraser Cup)Class 6 · 21f · Good · 13 ran 2nd 13/2
29 May 12 Hexham Impact Zone (GB)J: Joanna Mason Ramside Hotels Heart Of All England Maiden Hunters' ChaseClass 6 · 24f · Good To Firm · 5 ran 1st 7/2
02 May 12 Cheltenham Impact Zone (GB)J: Joanna Mason AGA Ladies Open Point-to-point Championship Final (Hunters' Chase)Class 4 · 25.5f · Soft · 9 ran 7th 40/1
27 May 11 Stratford Poppy Day (GB)J: Joanna Mason pointtopoint.co.uk Champion Novices' Hunters' Chase (For The John Corbet Cup)Class 2 · 27.5f · Good · 15 ran 6th 20/1
04 May 11 Cheltenham Poppy Day (GB)J: Joanna Mason Aga Ladies Open Point-To-Point Championship Final (Hunters' Chase For Lady Riders)Class 3 · 25.5f · Good To Firm · 10 ran 5th 16/1
30 Apr 11 Hexham Impact Zone (GB)J: Joanna Mason Ramside Hotels Heart Of All England Maiden Hunters' ChaseClass 4 · 24f · Good To Firm · 10 ran 2nd 13/2
24 Mar 11 Southwell Poppy Day (GB)J: Joanna Mason Betting Secrets Revealed At Racingprofits.net Open Hunters' ChaseClass 6 · 24f · Good · 13 ran 4th 10/3F
08 Feb 11 Market Rasen Poppy Day (GB)J: Joanna Mason Beaumontcote Maiden Hunters' ChaseClass 6 · 23.5f · Good · 9 ran 2nd 15/8F

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 I M Mason's strike rate?
I M Mason has won 1 of 21 runners since 2008, a strike rate of 4.8% (as at 22 October 2026). Figures are computed from our own results archive. A small sample — fewer than 30 runners, so read the count before the percentage.
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 22 October 2026, computed from our own results archive (2005 onwards; aggregates from 2008).