FCA have Prem on their 321's but its nothing like the long haul FCA prem.
Also they only have 3 x 321's left in the fleet, my guess would be that these will go as soon as the leases are up, they're currently based 1 x lgw, 1 x stn and 1 x ema.
BRS used to be a 321 base with 2 of them until nov 06.