Polling staff will be able to offer support on polling day, or you can bring someone with you. In England, anyone over the age of 18 can help you cast your vote. They do not need to be eligible to vote in that election.
Polling stations should have large-print sample ballot papers, and tactile voting devices to help people with visual impairments.
You can take your phone into the polling booth to use magnifier or text-to-speech apps, or the phone torch to improve lighting. But you must not take any photos inside the polling station.
Source -
www.bbc.co.uk/news/explainers-56849080