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Horse profile

Mayfield Boy (GB)

6yo gelding (at last run, Aug 2017) · Last trainer Antony Brittain · Last owner Antony Brittain
by Authorized (IRE) out of Big Pink (IRE) (Bigstone)
22 runs · 12 courses · from Sep 2013
As at 21 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 1 Aug 2017 — 3,368 days ago. Our archive can't say whether the horse is still in training.
Last run Aug 2017 · 9th of 12 2 wins · Newmarket & York Last raced off OR 55
KTB Profile

Mayfield Boy (GB) is 2 from 22. Hasn't won since May 2014. Both wins have come on turf — 0 from 5 on the all-weather. Last raced off 55, 23lb below the career-high mark.

Based on 22 archived runs · updated 21 Oct 2026
KTB at a glance All wins on turf OR ↓ 23lb off peak
Official rating55↓ 23lb off peak
55 50–78

KTB Speed and Rating

KTB Speed

Best recent Speed 97 the best of the last 3 graded (A or B) runs · Beverley, 1 Aug 2017

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 6 figures · best 97A · median 81
GoingRunsBestMedianSince 21 Oct 2025
Standard (AW)485A76.5—
Good to Soft297A96.5—
DistanceRunsBestMedianSince 21 Oct 2025
1m – 1m1f485A76.5—
6f – 7f297A96.5—

KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 6 figures from 6 runs · as at 3 Oct 2026 · a record, not a forecast

KTB Rating

Best recent KTB Rating 77A the best of the last 3 rated runs · Beverley, 24 Jul 2017 Official rating 55 at the last run, 1 Aug 2017

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 22 figures · best 86A · median 63
GoingRunsBestMedianSince 21 Oct 2025
Good to Firm782B66—
Standard (AW)550A44—
Good586A69—
Good to Soft382B77—
Heavy1———
Soft1———
DistanceRunsBestMedianSince 21 Oct 2025
1m – 1m1f1786A66—
6f – 7f477A61.5—
1m2f – 1m4f1———

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 22 figures from 22 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

Progeny in our archive have won 13.5% of 7,021 runs since Jan 2008 (543 horses).

Weakest on standard (aw) going: 9.3% from 1,043. Strongest at trips beyond 3m (all codes): 19.8% from 126. Weakest over 6f – 7f (all codes): 6.4% from 267.

GoingRunsWinsSRvs sireThis horse
Firm2400%−13.5—
Good to Firm5977612.7%−0.80 from 7
Good1,78425514.3%+0.81 from 5
Good to Soft1,10715614.1%+0.61 from 3
Soft1,70024614.5%+10 from 1
Heavy76511915.6%+2.10 from 1
Standard (AW)1,043979.3%−4.20 from 5
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f800%−13.5—
6f – 7f267176.4%−7.10 from 4
1m – 1m1f681629.1%−4.42 from 17
1m2f – 1m4f1,70121912.9%−0.60 from 1
1m5f – 2m2,16235016.2%+2.7—
2m1f – 2m4f1,46820413.9%+0.4—
2m5f – 3m6087312%−1.5—
Over 3m1262519.8%+6.3—

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
Big Pink (IRE) (Bigstone)

4 siblings in the archive, 2 winners — best of them Fuschia (GB) (1 win).

The wins came over 7f–1m4f; the highest grade won is Class 5 (Flash of Colour (GB)).

ProduceRunsWinsWin tripsBest grade
Fuschia (GB)517fClass 6
Flash of Colour (GB)1011m4fClass 5
Careless Whisper (GB)30——
Avon Rock (GB)80——

Record by conditions

GoingRunsWinsSR£1
Good to Firm 7 0 0% −7.00
Standard (AW) 5 0 0% −5.00
Good 5 1 20% +5.00
Good to Soft 3 1 33% +5.00
Heavy 1 0 0% −1.00
Soft 1 0 0% −1.00

ClassRunsWinsSR£1
Class 4 9 1 11% +1.00
Class 5 6 1 17% +2.00
Class 6 6 0 0% −6.00
Class 3 1 0 0% −1.00

CourseRunsWinsSR£1
Beverley 4 0 0% −4.00
Doncaster 4 0 0% −4.00
Pontefract 3 0 0% −3.00
Wolverhampton (AW) 2 0 0% −2.00
York 2 1 50% +8.00
Newcastle (AW) 1 0 0% −1.00
Chelmsford City (AW) 1 0 0% −1.00
Southwell (AW) 1 0 0% −1.00
Wetherby 1 0 0% −1.00
Redcar 1 0 0% −1.00
Newmarket 1 1 100% +7.00
Newcastle 1 0 0% −1.00

DistanceRunsWinsSR£1
1m – 1m1f 17 2 12% +1.00
6f – 7f 4 0 0% −4.00
1m2f – 1m4f 1 0 0% −1.00

JockeyRunsWinsSR£1
Cam Hardie 5 0 0% −5.00
David Allan 5 1 20% +5.00
Graham Lee 2 0 0% −2.00
Kieren Fallon 2 1 50% +6.00
James Sullivan 1 0 0% −1.00
Miss Serena Brotherton 1 0 0% −1.00
Mathew Still 1 0 0% −1.00
Duran Fentiman 1 0 0% −1.00
Paul Mulrennan 1 0 0% −1.00
Kevin Stott 1 0 0% −1.00
P J McDonald 1 0 0% −1.00
Andrew Elliott 1 0 0% −1.00

HeadgearRunsWinsSR£1
None 21 2 10% −3.00
Cheekpieces 1 0 0% −1.00

SeasonRunsWinsSR£1
2017 4 0 0% −4.00
2016 4 0 0% −4.00
2015 2 0 0% −2.00
2014 8 1 13% +0.00
2013 4 1 25% +6.00

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
01 Aug 17+8d Beverley ROA/Racing Post Owners Jackpot Handicap Class 5 · 7.5f · Good To Soft · 12 ran 9/12 2½ 8-11 5597A54A James Sullivan 9/1
24 Jul 17+62d Beverley Sky Bet Go-racing-in-yorkshire Summer Festival Handicap Class 6 · 7.5f · Good To Soft · 13 ran 5/13 ½ 9-4 5596C77A Cam Hardie 33/1
23 May 17+57d Newcastle (AW) Tech Talent Handicap (Div 2) Class 6 · 8f · Standard · 12 ran 11/12 ½ 8-11 5076C44C Cam Hardie 28/1
27 Mar 17+151d Wolverhampton (AW) Betway Handicap Class 6 · 9.5f · Standard · 12 ran 11/12 2½ 9-1 5463A39A Cam Hardie 50/1
27 Oct 16+6d Chelmsford City (AW) Bet toteexacta At betfred.com Handicap Class 6 · 8f · Standard · 16 ran 14/16 ½ 9-6 5977B48A Cam Hardie 33/1
21 Oct 16+71d Wolverhampton (AW) Susan Box Memorial Handicap Class 6 · 8.5f · Standard · 12 ran 10/12 1 9-3 5985A50A Cam Hardie 25/1
11 Aug 16+154d Beverley White Rose Saddlery Amateur Riders' Handicap Class 6 · 8.5f · Good To Firm · 10 ran 5/10 shd 10-10 60—76A Miss Serena Brotherton 8/1
10 Mar 16+241d Southwell (AW) Ladbrokes Handicap Class 5 · 7f · Standard · 11 ran 10/11 7 8-8 64—40C Mathew Still 25/1
13 Jul 15+75d Wetherby Racing UK Anywhere Handicap Class 5 · 9f · Good · 14 ran 9/14 8 9-6 68—53C Duran Fentiman 20/1
29 Apr 15+223d Pontefract Betfred Supports The Nrc Handicap Class 5 · 8f · Good To Firm · 7 ran 6/7 8 9-1 69—48C Graham Lee 11/1
18 Sep 14+33d Pontefract Watch Racinguk Anywhere Using Our Ipad App Handicap Class 4 · 8f · Good To Firm · 11 ran 11/11 ½ 9-0 72—54C Kieren Fallon 20/1
16 Aug 14+17d Doncaster Betfred 4x Odds On Lucky 31s Handicap Class 4 · 10f · Good · 7 ran 6/7 3½ 9-2 75—60A Paul Mulrennan 8/1
30 Jul 14+5d Redcar racinguk.com/Anywhere: 3Devices, 1Price Handicap (Straight-Mile Championship Qualifier) Class 4 · 8f · Good To Firm · 4 ran 4/4 nk 8-13 77—66B David Allan 7/1
25 Jul 14+7d York DRS Television Apprentice Handicap Class 4 · 8f · Good To Firm · 7 ran 6/7 2 9-10 76—66A Kevin Stott 9/2
18 Jul 14+33d Pontefract Colstrope Cup Handicap Class 4 · 8f · Good To Firm · 5 ran 2/5 ½ 9-1 76—82B P J McDonald 7/2
15 Jun 14+16d Doncaster Ben Elephant Handicap (Rnd) Class 4 · 8f · Good · 12 ran 10/12 nk 8-13 76—71A David Allan 20/1
30 May 14+18d Newmarket Lex Autolease Classified Stakes Class 5 · 8f · Good To Soft · 6 ran 1/6 9-0 75—82B Kieren Fallon 7/1
12 May 14+199d Doncaster Cash Out On The Betdaq + App Handicap (BOBIS Race) (Str) Class 4 · 8f · Heavy · 5 ran 4/5 2¼ 9-3 76—68B Graham Lee 6/1
25 Oct 13+14d Doncaster Racing Post Weekender Nursery (Str) Class 3 · 8f · Soft · 10 ran 9/10 3 8-11 78—60C David Allan 13/2
11 Oct 13+9d York Website Designers Yorkshire Maiden Auction Stakes Class 4 · 8f · Good · 15 ran 1/15 8-9 ——86A David Allan 9/1
02 Oct 13+14d Newcastle Irish Stallion Farms E.B.F. Maiden Stakes (Str) Class 4 · 8f · Good To Firm · 10 ran 2/10 4 9-5 ——80A David Allan 12/1
18 Sep 13 Beverley Bet totequadpot Text Tote To 89660 Maiden Auction Stakes Class 5 · 7.5f · Good · 13 ran 4/13 1¾ 8-9 ——69A Andrew Elliott 33/1

Quick answers

How many races has Mayfield Boy (GB) won?
Mayfield Boy (GB) won 2 of 22 archived starts between 2013 and 2017, a strike rate of 9.1%. Placed 4 times in total (18.2% of starts).
Who trained Mayfield Boy (GB)?
Mayfield Boy (GB) was trained by Antony Brittain on the most recent run on record, at Beverley on 1 August 2017.
Who is Mayfield Boy (GB)'s sire?
Mayfield Boy (GB) is by Authorized (IRE) out of Big Pink (IRE), whose sire is Bigstone.
What going does Mayfield Boy (GB) prefer?
Mayfield Boy (GB) has the best record on good to soft going: 1 win from 3 starts (33.3%). Only going bands with at least three archived starts are read, so this is a direction rather than a settled preference.
What is Mayfield Boy (GB)'s official rating?
The most recent official rating on record is 55, from the run on 1 August 2017. The highest on record is 78.
What is Mayfield Boy (GB)'s sire's record?
Authorized (IRE)'s progeny in our archive have won 13.5% of 7,021 runs since Jan 2008 (543 horses), Flat and jumps together. Weakest on standard (aw) going: 9.3% from 1,043. Strongest at trips beyond 3m (all codes): 19.8% from 126. Weakest over 6f – 7f (all codes): 6.4% from 267.
Who are Mayfield Boy (GB)'s siblings?
Out of Big Pink (IRE), Mayfield Boy (GB) has 4 other produce in our archive, 2 of them winners. Most wins: Fuschia (GB) (1). Highest grade won: Class 5 (Flash of Colour (GB)). The wins came over 7f–1m4f. As at Oct 2026.

Record shown from September 2013. 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.