OK, a quick update. Apparently I will get Business Class on Qatar Airways. The use of Economy only relates to non Oneworld airlines. I don't know how that would work with the other Airline that we are tied in with that we can't mention, but many guys here have been upgraded with them even on Standby leisure trips. Anyway, it will be J class and one of the sectors is a 787, so something to either dread or look forward too !
SpamCanDriver:
I never said that I wanted to by a Standby ticket and get an upgrade. I was asking about either getting Business Class on a Duty Ticket (which is completely different to Standby), or buying a Standby Business ticket on Lufthansa or the other airline, which I am perfectly entitled to do.
Turin:
Maybe you work for the airline I used to work at for 13 years, London Airways
I did also consider using my once per year free Club Ticket, but I don't think my Wife would be too pleased if I wasted it on a work trip !