I have an iPhone 4 and the latest version of the BA app. When I try to login using my Exec number and PIN, the app says "Log-in failed. Sorry, we are currently unable to retrieve your upcoming flights. Please try again later". I get this message every time I try and access my flights.

I do have upcoming flights (at least four). I have tried deleting the app and re-installing, including turning off and on between re-installs. I have tried removing stored data.

Any ideas welcome.