Hi there,

As soon as you join BMI diamond club your membership number starts with 0. When you get to silver it starts with 6 and when you are gold it starts with 1.

Although I can acess my account online using the 0 one, I don't know which one to quote on flights. I used the 0 one and it came back with an error that this is not valid but on Singapore flight I tried to use the 6 one and it wanted the 0 one. Its all a bit confusing and I'm afraid it will lead into losing miles

Thanks