p	commonly referred to as a small 'p'; the horse is likely to improve
P	commonly referred to as a large 'P'; the horse is capable of much better
+	the horse may be better than rated
?	the rating is suspect or (used alone) the horse is out of form or cannot be assessed with confidence
§	the 'Timeform squiggle'; the horse is unreliable (for temperamental or other reasons)
§§	the 'double squiggle'; the horse is so unsatisfactory as to be not worth a rating
x	a poor jumper
xx	so bad a jumper as to be not worth a rating

You will also find the following In-Play symbols used in Race Passes.

Start
1	led/disputed lead
2	prominent/close up
3	mid-division
4	towards rear
5	behind
S	very slowly away
s	slowly away
O	badly outpaced
o	badly outpaced
Mid
K	travelled notably strongly
k	travelled comfortably
L	raced very lazily
l	raced lazily/went in snatches
P	pulled very hard
p	pulled hard
J	jumped very well
j	jumped well
xx	made numerous mistakes
x	made mistakes
End
F	found nothing
f	found less than seemed likely
I	idled markedly
i	idled
R	responded really well to pressure
r	responded to pressure
§	signs of temperament
§§	marked reluctance

Equipment carried abbreviations are as follows.

b	blinkers
es	eyeshield
s	(sheepskin) cheekpieces
t	tongue tie
v	visor

In addition, the following abbreviations are used.

3 b.c.	means three-year-old bay colt. You may also see br (brown), ch (chestnut), gr (grey) or ro (roan), and h (horse), g (gelding), f (filly) or m (mare).
8g	in form figures gives the distance (in furlongs) and the going (as returned by Timeform). The going abbreviations are h (hard), f (firm or fast), m (good to firm), g (good or standard), d (dead), s (soft or slow) and v (heavy)
a	used before a distance or rating indicates a performance on the all-weather. You may also see c (steeplechase), h (hurdle) and F (National Hunt Flat race)
G1	Group/Grade 1. Similarly G2 (Group/Grade 2), G3 (Group/Grade 3), W (weight-for-age/conditions), N (novice), S (seller), C (claiming event), A (amateurs event). Where a number appears in the ratings summary, rather than a letter, this is the BHB mark off which the horse ran in a handicap.
TRW	Timeform Ratings of Winners. The weight-adjusted Timeform rating that the winner of the race has achieved in each of the last five years.
TWFA	Timeform weight-for-age. Timeform race ratings are adjusted to 12-7 (jumps) or 10-0 (Flat) unless shown. So, in a Flat race, TWFA 4 9-13, 3 8-12 indicates that ratings for 3-y-os are adjusted to 8 stone 12 lb and for 4-y-os to 9 stone 13 lb. Any older horses would have their ratings adjusted to 10 stone.
*	in form figures indicates 'won'. Other superior figures indicate finishing position (2nd - 6th). Letters used include F (fell), pu (pulled up), ur (unseated rider), bd (brought down), r (refused), su (slipped up), ro (ran out) and co (carried out).