BA CityFlyer Embraer 190 G-LCYP positioned London Stansted – Chambery as BA9791 early this morning in order to operate a Chambery – London Stansted charter as BA9792. The aircraft then positioned London Stansted – Chambery as BA9793 in order to operate a second Chambery – London Stansted charter as BA9794. The aircraft then positioned London Stansted – Edinburgh, also as BA9794.