We still had them in Varley Road up until a few years ago !, our next door neighbour used his as a shed, whilst my dear old Dad spent ages demolishing ours !
Excuse my ignorance but the point of the Dragons Teeth was ?
Don't know about those ones but those on Crosby Beach were to prevent landing crafts/tanks etc.
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Dragons teeth. I remember a newspaper photo, taken during the so-called Phony War of 1939-40, of a Dutch sentry standing on guard behind a line of dragons teeth anti-tank barriers. The caption said that should the anti-tank barrier fail to stop any invading German force then the Dutch would open their dykes and make the ground impassible for tanks and such. The Germans, being serious minded about war, simply flew into Rotterdam's Waalhaven in float planes.
exacta2a's Dragons Teeth photo at Crosby featured in the Liverpool Echo (8/4/11)
There are also a few along the Cheshire Lines cycle path, East of the Formby by-pass, near a couple of bridges.