(18 Aug 2013, 8:57 pm)Daniel wrote From when I was out all night on the final night for the N58, I can't recall seeing them immediately (if at all) in the morning.
I would therefore assume they're likely to be the last two out of the depot on a morning, allowing a brief rest period for the bus.
No bus is built to operate 24/7.
Indeed. Presumably they do need refueling, cleaning etc at some point!