also been wondering about bike computers - a fair number of the guys have them but not sure it's legal?
3.2.7 Pumps, spare tyres and race computers must be
securely fastened. All other equipment not essential
for racing purposes must be removed
3.2.4 Cycles used for track racing shall not be fitted with
freewheels, quick release wheels, wing nuts, brakes or
similar accessories, except by permission of the Board
or the Region concerned.
.