In the days of loco-hauled services running round was relatively unusual, especially at dead-end termini (more common at through stations) it was more common to provide a fresh "turnover" loco. Long ago it was also less common to turn round "in the platform", the stock would be taken away by a pilot loco to sidings, and returned later for the departure. Major terminal stations were often divided into "arrival" and "departure" sides, which lasted until the 1960s brought modern air-braked stock, more frequent services, and much higher stock utilisation. Until then major express stock, for the likes of the Cornish Riviera or the Flying Scotsman just made one single journey per day.
A further combination not mentioned so far I think is that the incoming loco would just propel the stock, without any loco at the other end, back out to sidings. If they were dead-end sidings facing the terminus this was the only way to do it. A shunter was needed in the leading vestibule, leaning well out of the leading droplight, to give handsignals during the propelling. At Taunton west end, well into diesel days with Hymeks, when propelling stock arrived from Minehead, Barnstaple, etc, it was standard practice for the shunter to grab a handful of paper towels from the adjacent toilet compartment to make their arm waving more visible!