What I think the OP is asking for is similar but slightly more niche in nature. A typical double run will of course generally serve a number of stops on both sides of a road, but at the very end it may do a loop of some roads or turn around at a single stop. So if you looked at a list of stop names you'd have duplicates for each side of a road, but between the last pair with the same name you may have several unique stops served only once, or a single turning point. I think, based on the example given, the OP is looking for an example where there is no sort of 'end' point of the double run, with buses serving the same place twice but with no stops in between.
In the example given, the buses stop at South Harrow Station [Stop F], turn around in South Harrow bus station
but without making a stop, then their next stop is again at South Harrow Station, but Stop D directly opposite their last stop [F]. In a more traditional double run you'd probably have something like Rail Station [F], Bus Station, Rail Station [D] - not consecutive stops directly opposite eachother like Rail Station [F], then immediately afterwards Rail Station [D] directly opposite, without any other stops in between them. I'd say normally a bus route in this situation elsewhere would probably only stop at one of the Rail Station stops, probably the one on the same side as the station entrance for convenience?
No idea if that explanation helps (assuming I've interpreted it correctly myself!) or just baffles further