▁of ▁permanent ▁sites ▁for ▁ 6 4 ▁heavy ▁guns , ▁using ▁P ile ▁Platform s , ▁construct ing ▁ 6 0 ▁miles ▁of ▁new ▁roads ▁to ▁take ▁heavy ▁traffic ▁and ▁set ▁up ▁ 3 , 5 0 0 ▁N issen ▁h uts . ▁These ▁necess itated ▁the ▁use ▁of ▁ 1 5 0 , 0 0 0 ▁tons ▁of ▁hard ▁core , ▁ 5 0 0 , 0 0 0 ▁concrete ▁blocks ▁and ▁ 2 0 , 0 0 0 ▁pan es ▁of ▁glass , ▁among ▁much ▁other ▁material . ▁The ▁setting ▁up ▁of ▁the ▁D iver ▁St rip ▁did ▁not ▁run ▁as ▁smooth ly ▁as ▁earlier ▁re deploy ments . ▁General ▁P ile ▁reported ▁move ▁as ▁" cha otic " ▁and ▁" de pl or able ▁and ▁the ▁attitude ▁of ▁staff ▁as ▁having ▁" a ▁general ▁l ass itude " ▁and ▁being ▁" pan icky ". ▁Nevertheless , ▁the ▁East ▁Ang li an ▁def ences ▁as ▁a ▁whole ▁were ▁successful , ▁less ▁than ▁ 6 % ▁of ▁air - launch ed ▁V 1 s ▁hit ▁London . ▁During ▁the ▁entire ▁V 1 ▁campaign ▁ 1 0 , 4 9 2 ▁V 1 s ▁were ▁target ed ▁at ▁London ; ▁ 4 , 0 0 0 ▁were ▁destroyed ▁by ▁the ▁various ▁D iver ▁def ences , ▁anti - air craft ▁guns , ▁f igh ters ▁and ▁bal lo ons , ▁and ▁ 2 , 4 0 0 ▁land ed ▁within ▁greater ▁London . ▁ ▁At ▁this ▁time , ▁its ▁order ▁of ▁battle ▁was