Lancaster PA474 was used for flight testing the Midge wing, which was mounted vertically in the location of the mid-upper turret. To better equip it for this flight testing role, the aircraft was modified to improve directional stability by fitting the somewhat larger Lincoln fins and rudders. That was its condition when it arrived at Waddington in 1965 and we volunteers 'restored' it without putting Lancaster fins back on. As far as I can tell it still has the Lincoln fins until today. Is it a genuine restoration?
I think it is. You do your best with what you have. As long as its airworthy.