I did jury service one time @gennepher .I received a jury summons today, and it requires me to attend in December.
No way would I be able to do that because of my disabilities, mainly my deafness. Also, apparently you cannot go to the toilet during the jury session. There's absolutely no way I could last that long. When I need a wee, I need to go NOW. And so I have been writing explaining my disabilities. But they certainly do not fit in the 1 and 1/2 by 6 inch box, unless maybe if I use a very fine mapping pen...
First week I just sat in a room as spare before getting sent home.
Week 2 was on a case.
All paid for and an interesting insight into its workings .
Kinda glad I did it.
I do suspect you can email someone.
In your case, I think your lack of hearing would preclude you immediately.
Easy to say don't worry, but I don't think it's a problem as long as you try to inform them.
"I am profoundly deaf and will be unable to follow proceedings well enough to be of service"
After all no one there will be aware of your super human power of 'reading peoples minds from a distance '....aka 'lip reading '
Of use, if you haven't already looked ?

Can a deaf person serve on a jury? | Mortons Solicitors
Can a deaf person serve on a jury? If a sign-language interpreter is needed then this would be a "13th" person in the jury room. How does it work?
