Worked OK in real life.
When BA set up Go it was a true clean sheet operation - every system tendered and up for the best deal. Lo-cost simply don't work if your not released from parent apron strings and schedules.
BA used Aerad charts - Go used Jepp
Fightplanning. Sword at BA and Go went, again, with Jepp. Reservations, met, notams, handling, rostering. Everything was rigorously rethought: even the safety reporting and analysis switched to another supplier. Each new contract was negotiated as a 'bearhug' - we hurt and you'll hurt. In my opinion only the Jepp flightplanning was a poor solution. Inflexible and useless back up relying on the coding ability of a single, old time mainframe DP guy in the States.
The only initial carryover was Sops but they rapidly evolved to suit the low cost/single type operation.
Shocking if you hail from a mature, monolithic operation but by heck it works. A very enjoyable but tiring ride to profit ensued.
Regards
Rob