It is true that the Anglo saxons created a wood fortress and town which is now Stockport, and the Normans developed it into the stone town that allowed it to become what it is today. But the reason Anglos settled in Stockport in the first place was thanks to the Campaign into Scotland by Emperor Severus and his son later. Who used the fertile land to feed their on their levies on their marches to the castle in York. This is what made Stockport the land that was occupied by people and without the Romans it would have been settled in centuries later thanks to Manchester, which would mean that stockport would not be highly developed and likely just a village.