I will try and answer for you!
this is what i wear for small/Intermediate show hunter classes.traditionally you would wear tweed jacket without velvet collar,biege jods (although i am wearing canary) long black leather boots with a garter strap,navy velvet hat,brown leather gloves,shirt and tie (no stocks) I wear a pale blue shirt,darker blue shirt or yellow shirt.£4 in Asda!size 14 1/2 neck so fits really well!
my red tie with a tie pin and a brown cane.I have no bling or scrunchie in my hair just a small neat bun in a hairnet, you and your horse should be smart and workmanlike in appearance with everthing understated.you should also wear spurs or dummy spurs (you don`t wear them for Itermediates) B has a brown straight cut working hunter saddle with a discreet brown numnah and stirrup leathers that are long enough for a male ride judge and irons wide enough for there feet!
She has a plain brown bridle with a pelham and wide flat nose band which should compliment your horses head conformation.The above would also apply to working hunter apart from the bitting as anything seems to go in workers!including martingales so if your horse goes well in a Dutch gag i am sure that they are allowed!
Working hunter starts with the jumping phase, you are being judged on the style around the course so a good flowing forward clear round is what is wanted.At some shows you are asked to gallop after the last jump although this does not seem to happen often nowadays.All the clear rounds will then go
in together at walk trot canter and gallop on both reins.then you are pulled in a line up for the judge to ride or to do an individual display.I walk away from the judge then trot on a circle cross the diagonal and ask for canter,circle few strides of trot and change the rein in canter,circle and along the straight
at the front of the ring gallop, pull up back to trot walk halt and salute.I never gallop behind the line up as the judge is watching you through horses and make sure you halt sideways on to the judge and not head on.A good gallop can clinch a hunter class.You would then possibly strip for an in-hand trot up for conformation,you can have a groom for this (my mum) they bring in brush water etc take saddle of and remove any sweat before you run the horse up for the judge.I hope this helps!