Originally Posted by
alexwuk
Well the specifically what doesn't happen if you book an extra seat in the same cabin you're travelling in. They're booked as "alexwuk/lebensraum" or "alexwuk/exst"
That is because the EXST is accommodated in the same PNR as the regular seat. Since you cannot mix booking classes (and accordingly cabins) for the same sector in a PNR your proposal is unlikely to be achievable.
