Well, at the moment the capacity to LON is roughly 6+1 x 70 by GR and 5 x 80 by BE = 890 seats daily. 6+1 flights on an E195 would mean 826 seats daily. Not sure about the current loads of BE and GR, but I guess 826 seats a day instead of 890 would do as it would guarantee improved load factors for GR.