Yes, on the condition that you own a halfway decent (not £40 from a supermarket) suit and you're comfortable wearing it. I do and am, and always have - it's a s

Yes, on the condition that you own a halfway decent (not £40 from a supermarket) suit and you're comfortable wearing it. I do and am, and always have - it's a sign of taking the other party seriously, to my mind. If it proves laughably formal (never has but I can imagine the environment where it would), removing both jacket and tie leaves a decent compromise almost anywhere. On the other hand, I've known others (though surprisingly few) who couldn't look less comfortable and at home in a suit if you cut anatomically unfortunate holes in it and poured in itching powder. For them it's clearly a net loss, but I think many people unnecessarily put themselves in that group.