The Great British Brunch—that’s the latest cost-cutting manoeuvre by British Airways, replacing lunch service on some long-haul flights with brunch for business and first-class passengers. The change, affecting flights departing between 8:30 a.m. and 11:29 a.m., has been described by some as a modest tweak, but it’s proving a contentious one. While the airline seeks operational savings, critics argue that this move…