I got called for jury service just after the end of my first year at university (in York). So I traipsed all the way back to Nottingham, was allocated to a case and sworn in, and at lunchtime on the first day went to ask where on the expenses form I should claim for my return coach fare back from York.

"York?"
"Yes, I'm a student there."
"Oh. Who do you pay community charge to?" [This was mid-1992.]
"Ryedale District Council."
"In York?"
"Yes."
"Oh. You shouldn't be here. You're not in our jurisdiction."
"Well I got a letter at my parents' address telling me to come here today, so I did."
"Hmmm. Have you been sworn in?"
"Yes, this morning."
"Oh dear. Well what we'll probably do is let you go after that case has finished."

So that's what happened. I didn't get my coach fare refunded, so I wrote to ask them for it. They wrote back to say "We don't refund travelling expenses" so I replied to say "Yes, but your mistake has massively inconvenienced me for no good reason, and has also left me, an impoverished student, somewhat out of pocket just for doing my civic duty" and they eventually caved in. It all left me rather less well-disposed to jury service, though.