The A330s are going to be on the CAI and TLV routes, I believe. ORD, LAS and the caribbean destinations have been discontinued from MAN.
The airbus is seen on some, select, high volume LBA-LHR flights, mainly Friday evenings and Monday mornings, IIRC. The rest of the flights are, indeed, operated by the ERJ. Not sure what the crews are doing, I assume operating from MAN or LHR, as required. They are also likely to be found on any charter operations BD may be running.
Brian.