Re. Fridge
you can empty the fridge …I leave the contents on the top shelf above the fridge ( will make sense when you are in the cabin) and put it back on the final day.
n.b. Put it back at lunchtime on the final day as the fridge is checked and locked late afternoon (so that final bills can be generated)
Currency for Southampton itineraries this year was GBP, but it’s pretty much a cashless boat, everything gets booked to your cabin card and you settle up on the card you registered when you came on board..
can’t answer re lactose free milk or speciality restaurants, but I have spent 5 weeks onboard Virtuosa this summer. (May, July, September) so can help with other questions as they arise .