Stockport Viaducts is technically correct as the first two track viaduct was built in 1839-40 and then a second viaduct was built alongside in 1887-89 to make four tracks.
Also the original plan was for three pyramids on site of the sole pyramid off junction 1, so in the eyes of the developers, Stockport Pyramids is a valid name too.
Can’t argue with the plural of Dosser though. One is more than enough.
9B Stockport Edgeley, 9F Heaton Mersey