▁T all bo ys ▁had ▁hit ▁one ▁of ▁the ▁sh aft s . ▁The ▁V - we ap on ▁was ▁revealed ▁to ▁be ▁the ▁V - 3 ▁can non . ▁▁ 1 7 ▁July ▁ 1 9 4 4 ▁– ▁W iz ern es ▁Six teen ▁Lanc aster s , ▁led ▁by ▁a ▁Mos qu ito ▁and ▁a ▁Must ang , ▁ ▁bom bed ▁W iz ern es ▁– ▁three ▁Lanc aster s ▁managed ▁to ▁drop ▁T all bo ys ▁( one ▁caused ▁the ▁d ome ▁to ▁shift ▁out ▁of ▁alignment , ▁two ▁others ▁blocked ▁the ▁entrance ). ▁▁ 2 7 ▁July ▁ 1 9 4 4 ▁– ▁W atten ▁One ▁T all boy ▁hit ▁the ▁target ▁but ▁did ▁not ▁pen et rate ▁the ▁structure . ▁▁ 3 1 ▁July ▁ 1 9 4 4 ▁– ▁R illy ▁La ▁Mont agne ▁Both ▁ends ▁of ▁the ▁railway ▁tunnel ▁were ▁col lapsed ▁by ▁T all bo ys ▁dropped ▁by ▁ 6 1 7 ▁Squadron . ▁ ▁William ▁Re id ' s ▁Lanc aster ▁at ▁ ▁was ▁hit ▁by ▁a ▁' friend ly ' ▁T all boy ▁dropped ▁from ▁. ▁ ▁Sort ies ▁against ▁German ▁dock y ards ▁Sh ipping ▁in ▁the ▁English ▁Channel ▁and ▁the ▁Atlantic ▁Ocean ▁were ▁threatened ▁by ▁U - bo ats ▁and ▁E - bo ats ▁station ed ▁in ▁France . ▁U - bo at ▁do cks ▁were ▁protected ▁against ▁conventional ▁aer ial ▁bomb ard ment ▁by ▁thick ▁concrete ▁roof s . ▁▁ 1 4 ▁June ▁ 1 9 4 4 ▁–