G-TBIC is owned by Nex (more correctly Nex Aviation Aircrafts Ltd I think), as you say has been in storage as Nex have no AOC and so far haven't managed to get another 146 operator to cover for them.
I just find it hard to understand why, if Aer Arann put the 146 on their AOC, they need Nex. 146's are cheap and plentiful right now, and Nex have no crews or engineers... so why?