Originally Posted by GeminiJumper
So a trot to canter is asked and the wrong lead is picked up. The rider must drop to a trot and pick up the correct lead?
So then if a flying lead change is asked say across the center line and the wrong lead is picked, the rider must fix it through a flying lead change?
Yes to both questions.
The only time that a "fix" would become difficult is is something happened when the rider was 3/4 the way through a movement.
Just an an example. Lets say a canter circle was started on the correct lead....then 3/4 around the circle the horse cross canters ( picks up a wrong lead in the rear) or somehow goes completely on the wrong lead.
To come down to trot and redo the canter would be viable ONLY if the canter is asked to continue beyond the circle. Then a trot to new canter would be the correct thing to do.
HOWEVER if the canter is only asked for on the circle and the test asked for a trot at the end of the circle then the best thing would to come down to a trot as close to the transition letter and continue on at the trot. In this case you will be more concerned with having the horse ready for the next movement asked for and having the least disturbance in the flow of the test.
Some of these things are judgement calls and if there is no time to make a correction then the the rider should always try to make the flow of the test as smooth as possible.