Thanks, this is where I was looking. I just was unsure since this information contradicted MMB. I was expecting to get an email or text message if the flight was cancelled.

Since posting I've given up any chance the flight would run today and have rebooked for Wednesday (next available through the rebook option). I called Denver airport and they knew the flight was cancelled. Shame the BA system doesn't work for notifying you when cancellations have obviously already happened.