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Horse profile

Master Rex (GB)

11yo gelding (at last run, Aug 2006) · Last trainer Ben De Haan · Last owner P A Deal
by Interrex (CAN) out of Whose Lady (USA) (Master Willie)
11 runs · 9 courses · from Jan 2005
As at 28 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 2 Aug 2006 — 7,391 days ago. Our archive can't say whether the horse is still in training.
Last run Aug 2006 · 5th of 8 Beaten favourite LTO Last raced off OR 125
KTB Profile

Master Rex (GB) is yet to win from 11 starts, though has placed 3 times. Best effort: 2nd of 10 at Stratford (Jun 2006). Last raced off 125, 13lb below the career-high mark.

Based on 11 archived runs · updated 28 Oct 2026
KTB at a glance OR ↓ 13lb off peak
Official rating125↓ 13lb off peak
125 122–138

KTB Speed and Rating

KTB Speed

No KTB Speed figures for this horse. The engine scores GB and Irish racing from Oct 2016; runs elsewhere, or earlier, have no figure.

KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 0 figures from 0 runs · a record, not a forecast

KTB Rating

Best recent KTB Rating 106C the best of the last 3 rated runs · Newbury, 25 Mar 2006 Official rating 125 at the last run, 2 Aug 2006

What the horse achieved in each race, in pounds on the official-rating scale, from the weight carried, the lengths beaten and the race's own level solved across the archive — never the market, never the official rating as a starting point. The headline is the best of the horse's last three rated runs on that code. A, B or C on a run is how much known form was in that race. What this means →

Jumps 11 figures · best 127C · median 107
GoingRunsBestMedianSince 28 Oct 2025
Good6127C116.5—
Good to Soft3118C107—
Good to Firm1———
Soft1———
DistanceRunsBestMedianSince 28 Oct 2025
1m5f – 2m10127C111.5—
2m1f – 2m4f1———

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 11 figures from 11 runs · as at 4 Oct 2026 · a record, not a forecast

Both figures are KTB's own, computed from the archive; no vendor rating enters either. Every run's figure is on its form line below with its grade. Grades measure how much the archive could see, never the merit of the run.

Run style is derived from in-running commentary, which our data provider does not supply for this horse's races.

Pedigree intelligence

Sire
Interrex (CAN)

Progeny in our archive have won 5.5% of 55 runs since Jan 2005 (5 horses).

GoingRunsWinsSRvs sireThis horse
Good to Firm1500%−5.50 from 1
Good20210%+4.50 from 6
Good to Soft800%−5.50 from 3
Soft9111.1%+5.60 from 1
Heavy300%−5.5—
Distance (all codes)RunsWinsSRvs sireThis horse
1m5f – 2m1400%−5.50 from 10
2m1f – 2m4f2000%−5.50 from 1
2m5f – 3m17317.6%+12.1—
Over 3m400%−5.5—

Flat and jumps together (all codes) · since Jan 2005 · as at 27 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam
Whose Lady (USA) (Master Willie)

No other produce in our archive. It holds racing in Great Britain, Ireland and France from 2005, so siblings racing elsewhere won’t appear here.

Record by conditions

GoingRunsWinsSR£1
Good 6 0 0% −6.00
Good to Soft 3 0 0% −3.00
Good to Firm 1 0 0% −1.00
Soft 1 0 0% −1.00

ClassRunsWinsSR£1
Class 3 7 0 0% −7.00
Class 2 2 0 0% −2.00
Class 1 2 0 0% −2.00

CourseRunsWinsSR£1
Newbury 3 0 0% −3.00
Newton Abbot 1 0 0% −1.00
Stratford 1 0 0% −1.00
Ludlow 1 0 0% −1.00
Wincanton 1 0 0% −1.00
Lingfield 1 0 0% −1.00
Aintree 1 0 0% −1.00
Cheltenham 1 0 0% −1.00
Sandown 1 0 0% −1.00

DistanceRunsWinsSR£1
1m5f – 2m 10 0 0% −10.00
2m1f – 2m4f 1 0 0% −1.00

JockeyRunsWinsSR£1
Noel Fehily 6 0 0% −6.00
Barry Fenton 3 0 0% −3.00
A P McCoy 1 0 0% −1.00
Robert Thornton 1 0 0% −1.00

HeadgearRunsWinsSR£1
None 9 0 0% −9.00
Blinkers 2 0 0% −2.00

SeasonRunsWinsSR£1
2006 5 0 0% −5.00
2005 6 0 0% −6.00

TypeRunsWinsSR£1
Chase 10 0 0% −10.00
Hurdle 1 0 0% −1.00

Splits include every sample, however small — muted rows are under 3 runs. A one-from-one record is a fact, not a trend: read the Runs column before the strike rate.

Form

DateCourseRace PosBtn Wgt ORKTB Jockey SP
2006 · 5 runs
02 Aug 06+52d Newton Abbot South West Racing Club Handicap Chase Class 3 · 16.5f · Good · 8 ran 5/8 8 11-12 12578C Noel Fehily 2/1F
11 Jun 06+78d Stratford Avon Estates Handicap Chase Class 3 · 17f · Good To Firm · 10 ran 2/10 5 11-5 123105C Noel Fehily 11/2
25 Mar 06+22d Newbury Sportsman Handicap Chase Class 3 · 16.5f · Good To Soft · 11 ran 5/11 1¼ 11-12 125106C A P McCoy 10/3F
03 Mar 06+50d Newbury Securon Handicap Chase Class 3 · 16.5f · Good · 8 ran 3/8 5 11-11 128117C Noel Fehily 7/1
12 Jan 06+17d Ludlow Ludlow Club Handicap Chase Class 3 · 16f · Good · 11 ran 4/11 10 11-9 130116C Noel Fehily 5/1
2005 · 6 runs
26 Dec 05+30d Wincanton Bathwick Tyres Taunton Mid Season Handicap Chase Class 3 · 15.5f · Good · 6 ran 2/6 7 11-12 130127C Robert Thornton 4/1
26 Nov 05+28d Newbury UK Hygiene Handicap Chase Class 2 · 16.5f · Good · 14 ran 8/14 7 11-2 13594C Barry Fenton 16/1
29 Oct 05+205d Lingfield Handicap Hurdle Class 3 · 16.5f · Soft · 7 ran 6/7 24 10-13 12276C Barry Fenton 11/2
07 Apr 05+20d Aintree Red Rum Handicap Chase (Grade 3) Class 1 · 16f · Good To Soft · 15 ran 5/15 2½ 11-5 137107C Noel Fehily 25/1
18 Mar 05+69d Cheltenham Grand Annual Handicap Chase (Grade 3) Class 1 · 16.5f · Good · 24 ran 7/24 3½ 10-8 138117C Noel Fehily 40/1
08 Jan 05 Sandown Handicap Chase Class 2 · 15.5f · Good To Soft · 9 ran 4/9 nk 11-9 138118C Barry Fenton 4/1

Quick answers

How many races has Master Rex won?
Master Rex (GB) has yet to win, from 11 archived starts between 2005 and 2006. Placed 3 times in total (27.3% of starts).
Who trained Master Rex?
Master Rex (GB) was trained by Ben De Haan on the most recent run on record, at Newton Abbot on 2 August 2006.
Who is Master Rex's sire?
Master Rex (GB) is by Interrex (CAN) out of Whose Lady (USA), whose sire is Master Willie.
What is Master Rex's official rating?
The most recent official rating on record is 125, from the run on 2 August 2006. The highest on record is 138.
What is Master Rex's sire's record?
Interrex (CAN)'s progeny in our archive have won 5.5% of 55 runs since Jan 2005 (5 horses), Flat and jumps together.

Record shown from January 2005. Our archive holds racing in Great Britain, Ireland and France from January 2005. Runs in other countries are not in it, and earlier runs are not available from our data provider. In-running comments are available from 2024 onward.