Horse racing draw advantage bias  NEWBURY 5F
Stalls positioned HIGH (H), Centre (C), or Low (L)

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WINNING STALL NUMBER

 1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
No

of

R

U

N

E

R

S

8    C            
9   H              
10 HH HC C     L   C H  
11       HC   C        
12             H    H H    
13          L         CC CC   C
14   C           H     C       H
15             H H C HC           C
16     H   H H                    
17                                  
18                                    
19                                      
20                               C        
21                                          
22                                              
23                                         C    
24                                                
25   H                         C                    
26                                                    
27                                   C                  
2 3 2 1 2 3

<--Good or better -->

2 3 2 4 0 3
13 16

Copyright 2003 [Howard Hutchinson]. All rights reserved.

Not a lot of races.
Newspaper draw advantage advice for Newbury is usually pretty unanimous in advising "High numbers best".
Some may add "in big fields".  Advice such as that is extremely poor.
Overall, on good or better going, the Bottom half, Top half split favours the Top half of the draw by 16 wins to 13, a difference of only 3 races.
There have only been 4 races with more than 16 runners, with no minority of stalls having been favoured.
On good or better going, stalls 1 to 6 won 13 of 35 races, the Top 6 stalls won 16 of 35 races 45.7%.
That is a difference of only 3 races, and a very low percentage for 6 stalls.

Usually, no mention is made of the going, or the most influential factor in these 5f races - stalls positioning.
Central placing of the stalls in sprint races often eliminates a draw advantage to some extent, but in this case, Central positioning of the stalls has produced a very good series of results that has favoured the Top 6 stalls.
On good or better going, with stalls Centre, in races of 8 - 20 runners, the Top 6 stalls won 11 of 16 races 69 %.
16 races is a very small sample.
The 2005 and 2006 advice was to watch these races.
During 2005, 2 of 4 races were won from the Top 5 stalls under those conditions.
In 2006, 2 of 3 races were won from the Top 5 stalls with 1 winner priced 50/1.
2005 result 2 of 10 (C), only had 7 runners, so in theory at least, these 5 stalls won 4 of 6 races under those conditions in races of 8 or more runners in the last 2 seasons.

With stalls High, results are less consistent.
On good or better going, in races of 8 - 20 runners, with the stalls
positioned High :-
The Top 6 stalls won only 4 of 14 races.
The Bottom half, Top half split is Bottom half 9 wins, Top half 5.

On good/good to soft in places or softer going, the few results show no bias favouring a minority of stalls.

2006 results :- 2-10 (H), 10-13 (C), 2-14 (C), 7-11 (C 50/1).

2005 results :-   2-8 (C), 2-9 (H), 2-10 (C, only 7 ran), 4-11 (C), 10-13 (C),
10-14 (C),
21-23 (C)