Just as a footnote to this discussion, it appears from an account of the opening of the line in question in the Birmingham Daily Post (4 August 1959) there was a temporary station at the junction for the opening celebrations:
"STOKE-ON-TBENT.
Opening of the New Biddulph Line of Railway. Yesterday the new line of railway from Stoke to Biddulph was formally opened for mineral traffic. At two oclock 300 invited guests started from Stoke station, and proceeded over the new line in a special train, appropriately decorated with flags, to the point of junction with the main line, about a mile below Congleton, where the Biddulph line terminates. The navvies who had been employed in the formation of the line were conveyed by special train to the same spot previous to the starting of the visitors train and were drawn up in a line at the side of the temporary station which had been erected, and heartily cheered the occupants of the visitors train as it drew up to its point of destination, arrived at which the company alighted, and proceeded to a tent in a field close by, where a luncheon of a very recherché description was served up by Mr. Shirreff of the Railway Hotel, Stoke."