Using A Double Bridle with a Show Pony...
There is no requirement by the British Show Pony Society to show a pony in a double bridle, and at Novice level the pony must be in a snaffle bridle.
At all levels the judge will take into consideration the severity of the bit used.
If a double bridle is used the straps of the bridle should be small and neat, and complement the pony's head.
Usually the noseband and browband will be raised and patterned.
The bridoon and weymoth bits should also be small, with a short shank on the curb.
A Tom Thumb Weymouth would be ideal.
The show sets now generally available are finer than the general double sets.
Running gags are not allowed alone or as part of a double bridle.
You must ensure the rider has or is given some training in how to use the double bridle.
If a child is nervous or inexperienced a better alternative is often the Rugby Pelham, which outwardly resembles a curb and bridoon but has a much less definite action.
About horse bits and bridles and when to use the various horse bits and bridles ...
Click through above to see which points should be observed when selecting a double bridle for different disciplines.
Consider all your horse bridle and bitting options and make sure you choose the correct type, size and combination for the sort of work you want your horse to do.