Hi Rebecca
I am a senco in preschool i am trying to get additional funding for a child in our setting i had to do referrals to other agencies first e.g. speech and language , educational psychologist and now doing additional funding form which is very detailed and need to show evidence if what u have been doing and outlining strategies used and outcome. It will probably take ages to be approved. This is in a preschool but probably different in your school.
Good luck in your new job i am also new in my job have only been doing it for few months. Very challenging and lots of paperwork.