Virgin Atlantic Credit Card Voucher

Hi

Does anyone have any experience with getting a further upgrade after using the Virgin Atlantic Credit Card Voucher?

I used my voucher to get the upgrade from Economy to Premium but I'm wondering if anyone knows a way around to then pay for or use miles to further upgrade to Upper?

Thanks

Nope, not allowed. Unless there's any "pay on the day" offers at check-in for cash. But can't be done in advance.

Call centre can cancel the voucher upgrade and use usual miles from economy to upper. I did this one way and used voucher on return leg as originally booked.

Nope, not allowed. Unless there's any "pay on the day" offers at check-in for cash. But can't be done in advance.

The 'pay on the day' offers at the check in desks are for cash fares so they wouldn't/shouldn't be offered to mileage or mileage upgrade vouchered tickets.

Call centre can cancel the voucher upgrade and use usual miles from economy to upper. I did this one way and used voucher on return leg as originally booked.

2 pax travelling in this instance? The Y-W upgrade is a round trip reward or could be split into two one-ways, but my understanding is that it will have to be in the same booking.

4 of us on 4 vouchers I think. Each voucher is (was) 2 x one way.