It amazes me that BIG brother BA guys don't see Cityflyer creeping into their London manopoly. ALL the routes Cityflyer are on, or going to be, are ALL served by BIG BA.
It was a huge worry at the time of the consolidation of CFE and BRT. There is a SCOPE agreement which limits the number of seats CFE can have in their aircraft, which is why the seat pitch in the ER9s is so luxurious. However what BA have not dared to try yet is to allow comparably poorly paid Embraer crews to fly on BA services out of LHR or LGW. That would be the game changer, as it is, LCY is just growth.