Yes, I believe it was actually. Corrie are renowned for doing this - using an actor for a minor role and bringing them back a few years later to play a completely different character.
The eagle-eyed among you might have also spotted "Carla" in a bedroom scene with Jason Grimshaw.
In this episode, Alison King played a housewife called Mrs Fanshaw, who Jason and Charlie do some building work for and she winds up seducing Jason. This was a couple of years before she joined the cast to play the role of Carla.