CityJet are indeed updating their 146s/RJs. They have bought the Northwest Airlines fleet, some of the most recent manufactured, which will replace the motley origin bunch they have at present. I believe the first of about 23 has just entered service.
CityJet effectively trade as Air France, even on the London City to Dublin route (all announced as Air France even on board) which I presume will continue.
Interesting to see the note about a cooperation with Scot. Wonder if Scot will actually handle some of the thinner routes like Belfast (I used that some years ago when FlyBe did it, pax numbers often in single figures).