RE: mission FRANTIC VII 100BG/390BG

Hello,
Does anyone knows anything about the Frantic VII return flight leg from Poltawa/Soviet Union?
Did B-17s returned to England after refueling/rearming in Poltawa? When?
Any answer will be greatly appreciated.
This is needed for the book being written about this mission.
All the best,
Andrew Pietkiewicz
Elkridge, MD 21075


currently in Wasrsaw/Poland doing research on downed B-17 from 390BG over Warsaw