There are several local and national charities and organisations able to support children and young people with visual, hearing or dual sensory impairments.
Dual Sensory support
Deafblind Enablement
Deafblind Enablement is dedicated to enabling people who live with sight and hearing loss to learn new skills, develop existing skills, and gain access to their community and services with dignity, respect, control and choice.
Deafblind UK
Deafblind UK provides practical help, emotional support, help with technology, information and advice for people living with sight and hearing loss.
Note: This is a suggestive list – other charities, organisations, and networks, particularly for specific or rare visual or hearing conditions can be found via online searches.