SNIP


The idea of a nuclear explosion was considered but in the end it was
decided
that a couple of valves to let in sea water would be cheaper and less
damaging to much of Kent..... That was in the Telegraph an the Mail and I
think the Times. Take your pick.
--

Bob flowerdew would do it by siphoning the water from above with a length of
old garden hose into the tunnel entrance. That would be my preferred method
also.

Steve