AGP and FAO are going up against BA, EZY, ZB and the charters. Heavy volume routes but maybe the frequencies a bit on the high side?
Nice going up against BA and EZY
MUC, NOC, ZRH and VIE not currently served from LGW
ZB and TOM are also on Nice, BA are on the ZRH and EZY, XL and FR have tried NOC. If FR couldnt make NOC work I dont know why EI think they can. A mid morning route to GLA might be a better idea as EZY and BA only fly morning and evening.
ZB do not serve Nice. There may be a charter I guess. And there are no TOM flights to Nice that are on sale as flight only. BA are axing LGW-ZRH at the end of the winter season
If EI were to do LGW-GLA they would need morning/evening flights as well as the mid-morning one you suggest. Once daily would not be competitive