If you go to the aircraft listings on the Virgin site
and select G-VXXL, the A380 to be, in the dropdown list you'll see this next to the provisional seating arrangement......
"Please Note : For the benefit of our friends from a.net, this map is far from final and was based on very early data. It WILL change and the layout will probably not look anything like this!"
No obvious saunas, gyms weights rooms either!!