With ALC around 915nm and AGP 1050nm from LCY I think that would be a bridge too far, unless the E190 could do it with a sensible payload. It's beyond the E170's limit with a full payload.
You might confuse what you read with the AGP/ALC charters being done from GLA this summer.
On June 21st both RJ85's will leave the fleet and we'll have 10 E-Jets on line. The last E190 has had it's delivery date pushed back to OCT/NOV IIRC because that one was intended for expension.