wrong aircraft flight VS015 ???

hi there i've been following flight VS015 on here and the aircraft is showing up as G-VTOP as operating that flight but i have been on various other databases ie libhomeradar and data.flight24.com regarding this flight and its showing up as G-VAST why could this be ??? can anyone explain this,i can only suggest that v-flyer is the only one that is giving a different aircraft to the others

Yep it's G-VAST on virgin's flight tracker, maybe there was an a/c change and V-Flyer not been updated?

Also Soul Sister shown on VS200 tonight and 201 HKG - LHR overnight??? Guess tonights 200 will have a different AC??