thanks for the advice, very revealing and far more straightforward than anything on BA's site!! The reason I asked is that I should hit into silver this year and it's nice to know what I can do if I reach that tier and also nice to know what I can do if I don't (but hold a business ticket)
Globaliser
I'd be interested to know just how much you can save via Lisbon? seems a bit extreme to get a cheaper business ticket, but you're right I do pay the fares myself so I'd like some idea of what the potential saving could be, perhaps more to the point, how do you find out when these offers are being run?