They swapped the Champagne for an English sparkling wine. Here's the advertising blurb on
VS's site.
To accompany Lorraine’s amazing food and making a special appearance on board for the first time is Virgin Atlantic’s new sparkling wine from English winery Hambledon Vineyard. Proudly grown and produced in Hampshire, Meon Hill Grand Reserve has been specifically selected to compliment the cabin pressure and humidity of the 787 cabin and has been found to stay bubbly for longer. The new sparkling wine will be launched on Birthday Girl and will be available exclusively on the 787 aircraft.