You've probably got the stats on Air France's seat.... Virgin's is 21" wide and 38" pitch. Take a look at it at
http://www.airliners.net/photo/Virgi...27b5ecbc08f696 (this is the back row... you don't want to sit here as the recline is a bit less, but being Virgin you can also choose your seat in advance for free, subject to the % allocated seats being below the threshold)