Upper class companion ticket only possible with Gold status?

[jlbpower]

Or can it be done with silver status + money?

[FFoxSake]

RTFM…
https://www.headforpoints.com/2022/01/16/what-is-the-best-virgin-atlantic-credit-card-for-you-2/

…
These are your rewards for hitting the spending target each year
Your reward is triggered IMMEDIATELY upon hitting the spending target. The target is £20,000 in a card year for the free Virgin Atlantic Reward Credit card and £10,000 in a card year for the £160 Virgin Atlantic Reward+ credit card.

Annoyingly, vouchers do not show anywhere online. The only sign that your voucher is available for us is a one-line entry in your Flying Club account statement along the lines of ‘Reward voucher – 0 miles’.

You can choose one of the following options:

A 2-4-1 voucher, valid for two years, for a Virgin Flying Club points redemption OR a Virgin Atlantic cash ticket, in Upper Class, Premium or Economy
A return upgrade – on either a cash or points ticket – from Premium to Upper Class, or from Economy Delight/Classic to Premium. You can either upgrade 1 x return flight if travelling alone or 2 x one-way legs of two return flights if travelling with someone else.
A Virgin Clubhouse lounge pass (requires a same-day Virgin Atlantic, Delta, KLM or Air France flight)
There is small print:

If you are a Red (no status) member, you need to pay 50% of the points for your 2nd ticket if you redeem your 2-4-1 voucher in Upper Class. This means that, for Upper Class redemptions for Red members, it is effectively a ‘2 for 1.5’ voucher. For Economy or Premium redemptions, it is a genuine ‘2 for 1’.
If you are a Gold member, you would receive two Clubhouse lounge passes instead on one if you chose that option
Taxes and charges need to be paid on the ‘free’ ticket as part of your 2-4-1 booking
Vouchers are valid for two years and you must fly the outbound leg of your trip before the expiry date
Reward seat availability is required to use the voucher. This means:

you can only upgrade a flight if there is a reward seat in the higher class (irrespective of whether you are upgrading a cash or a points ticket)
you can only apply a 2-4-1 voucher to a cash booking if there is a reward seat available for the 2nd ‘free’ seat
The voucher benefits are substantially better now than they were before changes in August 2020. You can now upgrade to Upper Class, you can now use the upgrade voucher on either cash or points tickets, and Red (base level) members can now redeem the 2-4-1 voucher in Upper Class.

If you usually travel on your own, the upgrade voucher is likely to suit you best. This can also be used by a couple to upgrade one leg per person on a return cash or reward flight.