I've gotten off multiple times for work reasons. I haven't been asked for ages though, so things may well have changed.
Personally, I don't feel competent to serve on a jury. I'm inattentive to things that bore me (and what I've seen of court trials would definitely bore me), probably biased to some degree and easily made irritable by uncomfortable chairs.
Hint: Jury duty papers are substantial and come in MoJ envelopes. Easily spotted if you aren't otherwise expecting correspondence from them.