There are many organisations and charities that offer support and guidance. Here are just a few:
Access All Areas – a company that makes disruptive theatre and performance by learning disabled and autistic artists.
Deafinitely Theatre – a producer of professional high-quality theatre for deaf and hearing audiences of all ages and backgrounds.
Disability Arts Online – a UK-based broad resource offering a platform to creatives with disabilities.
Extant – the UK’s leading professional performing arts company of visually impaired artists and theatre practitioners.
Graeae Theatre Company – a theatre company that aims to champion diversity across the sector, and places Deaf and disabled artists centre stage.
Mind the Gap – England’s leading learning disability performance and live arts company, offering a wide range of programmes.
Stagetext – a registered charity that provides captioning and live subtitling services to theatres and other arts venues to make their activities accessible to people who are d/Deaf, deafened or hard of hearing.
VocalEyes – a registered charity that aims to make cultural experiences more accessible to those with visual impairments.
Also, here’s a great article highlighting Disabled theatre companies and organisations across the UK.