Virgin canceling a flight - What is the rule re: G's

I have flights to Dubai booked for 29th Jan - 3rd Feb 2019 with Virgin. I bought Economy Classic and upgraded to UC with miles to G's...

Virgin appear to have cancelled our outbound flight (although we haven't received a notification yet). I'm pretty confident because the flight has been 'off sale' for 1 month now... They are claiming 'IT glitch' but i have had this scenario before and know what's coming.

My question is what happens in people's experience with the flight being moved? Do G's have to be available for the new date? Can i ask to be moved to new dates? Not sure how flexible they are with cancellations?

Any advise from past experience would be much appreciated!

If they cancel a flight then they have to accommodate you onto alternatives or offer you a full refund.

Makes no difference how you paid so there dosen't have to be G availability in your case as they can just create it.

As above, then VS force the cancellation on you (or it is forced on them by, say, severe weather) the rules do go a bit out of the window.

Last September I was in Florida when it was clear Hurricane Irma was going to hit operations. I ended up flying home two days early - when I called the call centre to rebook, there was one revenue UC fare showing on the flight I flew home on (just before MCO closed down for Irma). This revenue fare was held by the agent at the start of the call and promptly switched to a G fare during the call for allocation to me.

Clearly Virgin were thinking one less passenger to re-accommodate once MCO re-opened after Irma had passed was a good thing.