The trap and greyhound jacket colour coding is as follows: If a reserve comes into the field the letter ‘R’ is used on the racecard and the dog in question will also have an 'R' added to their racing jacket. When a dog becomes a non-runner due to injury or illness, a reserve can be substituted into the field but this doesn't always happen if there is not a suitable reserve available. Previously in the UK eight runners/traps were used on rare occasions but these races have now been phased out due to safety considerations. When it comes to greyhound-graded racing around the tracks there are six different types which are as follows:Īll greyhound races in the UK comprise a total of six runners/traps. A full list of the current greyhound tracks in the UK is detailed below together with details of the distances run at each track since January 1st 2022: Track We cover all tracks registered under the GBGB ( Greyhound Board of Great Britain) and the major Greyhound races.