It doesn't have CityFlyer Express routes, it comes from BA Connect which had nothing to do with CityFlyer.
Would you care to check the Companies House website before making that totally incorrect statement? The CityFlyer entity trading at London City today is the same legal company (02571224) incorporated in 1991 which traded at Gatwick. All of the aircraft used by BA CityFlyer at LCY in its formative stages were also CityFlyer Express ones!