I believe SN have upped frequency on the back of this though. One of the rotations will use the airbus too.
I don't think they've upped frequency, just replaced one of the flights from the RJ to the 319. Considering SN used to have usually three MAN rotations on the RJ85 during Summer and FlyBe another 3/4 rotations to BRU, it's a huge drop in a capacity that even the 319 can't fill.