Edit post and suggest Chinnor, where on return from PR, the loco working the train uncouples and runs into one siding, then a yard loco pulls the carriages into the same yard, the train engine is coupled onto what is now the frount of the train and pulls it back to the platform.
A former reversal not at a station used to happen at Welwyn Garden City prior to electrification, when the train (DMU) would proceed to a point north of the station, it would reverse with the guard in what was now the leading cab, giving firstly 3 bells when given the road and keeping a lookout until back in the station and the driver changed ends
Going overseas, the Central Railway of Peru has several zig zags which all traffic has to negotiate