Ok, one thing always seems to lead to another. Tried airplay (ipad3/8.1.2/MF3/latest Airport express) on music app but no airplay icon, no airplay. Then tried livetrax (my theatre music/fx player). Airplay icon,tapped it and airplay works OK. Then switched back to Music app which I hadn't quit, still no icon for airplay but it's working. So there's half an answer for you.