The code for Hull is 01482, the other number is the council main switchboard.
My cousin is a manager at social sercices, i will ask him for numbers next time I see him.
Also try East Riding Social Services, they cover the towns and villages around Hul, including Hessle, Cottingham etc.
Humberside Police have a register of translators, that they use for translating for deaf suspects, and victims of crime.
Hull Deaf Club is also a good contact, I am going to work in 5 minutes, but will tryto post a few numbers when i get home.john