Paul,
Regarding M-OMAN/A6-MBA, I have asked X for some advice. I have it as A6-MBA since 20/9 when i believe it was noted as such in Dubai if my memory serves me correctly and AvDb also shows it as A6-MBA. Perhaps we have been a wee bit premature with the change but I am awaiting a reply to my query.
It is def M-OMAN, with no reregistration at this time.
Alan