I think I have it ...
''Bigjet 345 Avoiding Action, turn right immediately heading ....., pop-up traffic is ...... 12 o'clock 2 miles overhead Oban indicating 2000' climbing .... ''
<alternative version>
"G-DRAM pass your message"
PS what time do you do the switch ... ?
PPS All the very best for a safe and successful switch .. see you at 7am on Sunday