RESULT!
Well basically rang up and said "Do you accept the 10 month NCB from someone like Admiral/Bell etc." Was told no but put me on hold for a bit.
Came back saying she spoke to a supervisor and that they would accept the 10 month as a proof of discount, and keep my rate the same as is, but it wouldn't be classed as a one year, so I'd be starting a new one year with Adrian Flux. However, even though this might seem bad, the 10 month accelerator I did have would of only been able to be used on someone like Admiral. With AF I'm covered much better, and mods like for like. At less than what a renewal is with the other companies. So all in all I'm pretty happy with that, yes it may mean I slightly bummed about in a years time I'll only have 1 NCB properly, but at least I got a cheaper deal for a modified car policy and don't have to pay £1000 (which it would of been). £600 FTW!