Hi JD, J_W & macb.
Thanks for your answers, appreciated.
Jack yes correct, checked up, can rollover in the manner you describe.
I did not know which of the various VIX options I had opened, checked the IG position info, expiry was 19/12 rather than the 17/12 I had wrongly assumed.
So, looking at the list provided by JW I had VXZ8. ( must be IG s default.)
Only other option available with IG seems to be VXF9, the second on the list.
Cannot get a price on the others.
Anyway, got lucky, had placed an ambitious 19.98 auto limit which got filled late yesterday.
Happy as I think that the best result I have had on the VIX.
Brutal day with other positions though.
ATB & GL