Yes we were there for 7 months solid, bar a few days when there were bank holidays or the barristers were discussing legal arguments that the jury weren’t allowed to hear.
When you’re called for jury service, it’s a jury summons, so it’s a legal requirement that you attend. Your employer can’t do anything about it and they have to continue to pay you as normal. As it happens, the judge in our case took the decision that the court would pay us after three months, due to it being such a long case. It’s hard for self employed people of course, they only get a fixed amount paid per week and also possibly lose business while they’re serving.
During the jury selection process you do get a chance to talk to the judge if you think you won’t be able to serve on a long case. So if you have regular hospital appointments, unbreakable work commitments, child care problems etc etc then, and IF you get a sympathetic judge, you might get excused, but it’s down to the judge and it’s not guaranteed. On our case, they had to start with a panel of over a hundred potential jurors to ensure they’d get 12 by the end of selection.