There were mutterings from the instructional staff at Sesto earlier this year about a mk2 139 with the increased AUM (as above) as well as the ability to run one of the engines as an APU (Wessex/Sea King actuated freewheel anyone?). I had also heard that to provide commonality across the 169/139/189 that the avionics would all begin to look like the 189, perhaps with the hope that changes between the types would only require a differences course rather than an entire TR.