Skipless,
In the real world, people HATE, HATE, HATE with a PASSION beyond reason, connecting from T5C as it's too far to T5A
Considering that the planes themselves often park almost next to each other, has there ever been consideration to providing an airside link from T5C directly into the Central complex, thus avoiding such a detour?
Or is joined up thinking between airlines which would far rather compete with each other than co-operate (although still no shortage of Oneworld from T3 etc) too much to hope for?