Ok, I'm in London now. Not quite the way I planned it. I went to the United desk and asked to 'OMC' over to London. The lady proceeded to tap away at her computer when she said the system isn't letting her go any further. She then called operations. Operations told her that ONLY United crew can 'OMC'. Is that true?? I ended up just non-reving. I didn't know if I was going to get knocked back if I went to AA or Delta, so thought I'd play it safe by non-reving. Can anyone tell me if there is any truth in this? Thanks.