Originally Posted by
shoreditch_tom
Does this mean I could upgrade my tickets to Club Europe, then cancel the whole thing and get a refund? Would it be a refund of everything I have paid, eg the economy fare plus the upgrade?
I don't think this is true. The pro-active upgrade in MMB will book you into a CE I class fare and its rules then apply to the whole booking. They are basically no changes and no refunds (except taxes). You would therefore lose the flexibility that you have on a M fare.