You've referred to a total loss of picture, in which case you should have also had an on-screen error message. W02 wouldn't surprise me, but I won't prejudge too much.
Is anything reported on the local status line, 0800 5610061? I doubt it, but it's something to eliminate.
Check the error code - if necessary compare against https://www.virginmedia.com/help/virgin-tv-error-codes - and go from there.
If it's W02, that's a signal error which (assuming no area faults) will need reporting to VM Faults. Either 150 (from a VM phone), 0345 4541111 (from any other phone) or wait on here for staff response, likely to be sometime tomorrow or Friday.
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