OK, we're off on a jolly around this wonderful world; it may take some time and hence we will not be back to the UK for perhaps several years.
What happens if we are called up for jury service in that time?
We have no way of knowing but assuming we don't show up as requested (highly likely) will there be a warrant for our arrest, for say dereliction of duty or perhaps contempt of court?
We assume the onus will be on us to advise them of our absence, hardly a clear case of "innocent until proven guilty" then.
Oh the irony...