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Horse profile

Heartstar (GB)

4yo filly (at last run, Mar 2021) · Last trainer John Mackie · Last owner Derbyshire Racing Iv
by Heeraat (IRE) out of Available (IRE) (Moss Vale)
14 runs · 6 courses · from Aug 2019
As at 21 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 8 Mar 2021 — 2,053 days ago. Our archive can't say whether the horse is still in training.
Last run Mar 2021 · 8th of 10 Won at Bath Last raced off OR 42
KTB Profile

Heartstar (GB) is 1 from 14, the win coming at Class 6 level. Hasn't won since Jul 2020. The win came on turf — 0 from 11 on the all-weather. Last raced off 42, 9lb below the career-high mark.

Based on 14 archived runs · updated 21 Oct 2026
KTB at a glance Won on turf, 0 on AW Win at Class 6 OR ↓ 9lb off peak
Official rating42↓ 9lb off peak
42 42–51

KTB Speed and Rating

KTB Speed

Best recent Speed 83 the best of the last 3 graded (A or B) runs · Southwell (AW), 15 Jan 2021

How fast the horse ran, as points against the day-corrected standard time for its course and distance: 100 is the median GB Class 4 handicap winner on that code; one point is 0.1% of the standard time. A, B or C is how much the day's card could tell us, not how good the run was. What this means →

Flat 14 figures · best 102A · median 66.5
GoingRunsBestMedianSince 21 Oct 2025
Standard (AW)11102A68—
Good1———
Firm1———
Good to Firm1———
DistanceRunsBestMedianSince 21 Oct 2025
Under 6f11102A70—
6f – 7f365A59—

KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 14 figures from 14 runs · as at 3 Oct 2026 · a record, not a forecast

KTB Rating

Best recent KTB Rating 55A the best of the last 3 rated runs · Southwell (AW), 15 Jan 2021 Official rating 42 at the last run, 8 Mar 2021

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 →

Flat 14 figures · best 64A · median 42.5
GoingRunsBestMedianSince 21 Oct 2025
Standard (AW)1164A44—
Good1———
Firm1———
Good to Firm1———
DistanceRunsBestMedianSince 21 Oct 2025
Under 6f1164A46—
6f – 7f344A40—

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 14 figures from 14 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
Heeraat (IRE)

Progeny in our archive have won 8% of 2,994 runs since Jan 2008 (194 horses).

GoingRunsWinsSRvs sireThis horse
Firm15213.3%+5.31 from 1
Good to Firm443357.9%−0.10 from 1
Good582396.7%−1.30 from 1
Good to Soft247228.9%+0.9—
Soft311216.8%−1.2—
Heavy891112.4%+4.4—
Standard (AW)1,3071098.3%+0.30 from 11
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f9049510.5%+2.51 from 11
6f – 7f1,393936.7%−1.30 from 3
1m – 1m1f443388.6%+0.6—
1m2f – 1m4f13375.3%−2.7—
1m5f – 2m7756.5%−1.5—
2m1f – 2m4f3512.9%−5.1—
2m5f – 3m900%−8—

Flat and jumps together (all codes) · since Jan 2008 · as at 21 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam
Available (IRE) (Moss Vale)

3 siblings in the archive, 2 winners — best of them Available Angel (GB) (2 wins).

The wins came over 6f–1m; the highest grade won is Class 5 (Veiled Truth (GB)).

ProduceRunsWinsWin tripsBest grade
Available Angel (GB)5021mClass 6
Veiled Truth (GB)616fClass 5
The Malton Mauler (GB)40——

Record by conditions

GoingRunsWinsSR£1
Standard (AW) 11 0 0% −11.00
Good 1 0 0% −1.00
Firm 1 1 100% +28.00
Good to Firm 1 0 0% −1.00

ClassRunsWinsSR£1
Class 6 11 1 9% +18.00
Class 5 3 0 0% −3.00

CourseRunsWinsSR£1
Wolverhampton (AW) 4 0 0% −4.00
Southwell (AW) 4 0 0% −4.00
Newcastle (AW) 3 0 0% −3.00
Beverley 1 0 0% −1.00
Bath 1 1 100% +28.00
Leicester 1 0 0% −1.00

DistanceRunsWinsSR£1
Under 6f 11 1 9% +18.00
6f – 7f 3 0 0% −3.00

JockeyRunsWinsSR£1
Oliver Stammers 3 0 0% −3.00
Megan Nicholls 3 1 33% +26.00
Toby Eley 3 0 0% −3.00
Joe Fanning 2 0 0% −2.00
Jimmy Quinn 1 0 0% −1.00
Cieren Fallon 1 0 0% −1.00
Cam Hardie 1 0 0% −1.00

HeadgearRunsWinsSR£1
None 8 1 13% +21.00
Cheekpieces 5 0 0% −5.00
Visor 1 0 0% −1.00

SeasonRunsWinsSR£1
2021 3 0 0% −3.00
2020 8 1 13% +21.00
2019 3 0 0% −3.00

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 ORSpdKTB Jockey SP
08 Mar 21+29d Wolverhampton (AW) Betway Classified Stakes Class 6 · 5f · Standard · 10 ran 8/10 1 9-0 4268A53A Joe Fanning 40/1
07 Feb 21+23d Southwell (AW) Heed Your Hunch At Betway Handicap Class 6 · 5f · Standard · 11 ran 10/11 3¼ 8-7 4570A21A Oliver Stammers 40/1
15 Jan 21+73d Southwell (AW) Play 4 To Score At Betway Handicap Class 6 · 5f · Standard · 12 ran 8/12 shd 8-8 4583A55A Joe Fanning 18/1
03 Nov 20+21d Southwell (AW) Heed Your Hunch At Betway Handicap (Div 1) Class 6 · 5f · Standard · 10 ran 3/10 1¾ 8-5 45102A64A Oliver Stammers 40/1
13 Oct 20+15d Newcastle (AW) attheraces.com Apprentice Handicap Class 6 · 6f · Standard To Slow · 13 ran 13/13 ¾ 8-8 4844C37C Oliver Stammers 66/1
28 Sep 20+3d Newcastle (AW) attheraces.com Handicap Class 6 · 5f · Standard · 10 ran 8/10 1½ 8-5 5092A41A Jimmy Quinn 80/1
25 Sep 20+33d Newcastle (AW) Sky Sports Racing Sky 415 Apprentice Handicap Class 6 · 5f · Standard · 12 ran 11/12 nk 8-13 5056A46A Megan Nicholls 28/1
23 Aug 20+19d Wolverhampton (AW) Visit attheraces.com Classified Stakes Class 6 · 5f · Standard · 10 ran 9/10 1¼ 8-11 5062A40A Cieren Fallon 10/1
04 Aug 20+13d Beverley Cherry Burton Cricket Club Handicap Class 6 · 5f · Good · 15 ran 14/15 1½ 8-11 5137C24A Megan Nicholls 17/2
22 Jul 20+22d Bath visitbath.co.uk Handicap (Div 1) Class 6 · 5.5f · Firm · 8 ran 1/8 8-10 4983A61A Megan Nicholls 28/1
30 Jun 20+264d Leicester Bodie Hodges Foundation Handicap Class 6 · 5f · Good To Firm · 7 ran 5/7 ¾ 8-13 5145A40A Toby Eley 11/2
10 Oct 19+10d Southwell (AW) Sky Sports Racing On Virgin 535 Maiden Stakes Class 5 · 5f · Standard · 9 ran 4/9 2 8-9 —80A48A Toby Eley 50/1
30 Sep 19+49d Wolverhampton (AW) Follow Us On LinkedIn At thecommercialflooringcompanyltd Novice Stakes Class 5 · 6f · Standard · 9 ran 9/9 ½ 8-11 —59A44A Cam Hardie 125/1
12 Aug 19 Wolverhampton (AW) Celebrating 22 Years Without David Chillery EBF Fillies' Novice Stakes (Plus 10) Class 5 · 6f · Standard · 9 ran 7/9 nk 8-9 —65A40A Toby Eley 125/1

Quick answers

How many races has Heartstar (GB) won?
Heartstar (GB) won 1 of 14 archived starts between 2019 and 2021, a strike rate of 7.1%. Placed 2 times in total (14.3% of starts).
Who trained Heartstar (GB)?
Heartstar (GB) was trained by John Mackie on the most recent run on record, at Wolverhampton (AW) on 8 March 2021.
Who is Heartstar (GB)'s sire?
Heartstar (GB) is by Heeraat (IRE) out of Available (IRE), whose sire is Moss Vale.
What is Heartstar (GB)'s official rating?
The most recent official rating on record is 42, from the run on 8 March 2021. The highest on record is 51.
What is Heartstar (GB)'s sire's record?
Heeraat (IRE)'s progeny in our archive have won 8% of 2,994 runs since Jan 2008 (194 horses), Flat and jumps together.
Who are Heartstar (GB)'s siblings?
Out of Available (IRE), Heartstar (GB) has 3 other produce in our archive, 2 of them winners. Most wins: Available Angel (GB) (2). Highest grade won: Class 5 (Veiled Truth (GB)). The wins came over 6f–1m. As at Oct 2026.

Record shown from August 2019. 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.