That's at least what Jethros is reporting. According to his website, G-IONA ferried CVT-EDI in early June and is to be broken up.
As for it being younger than G-DRFC, it can only be a matter of months, with IONA being c/n 17 and DRFC c/n 7. Some of the oldest ATR42s still around.
On whose AOC is G-DRFC being operated? Apparently Atlantic Express surrendered its AOC earlier in the year.