Although not recently discovered we went to have a look at 2 holes from the WW2 era in Hamstreet. The first hole had about a foot or more of water in it when we arrived but this was quickly pumped out to reveal a small concrete lined and concrete floored chamber about 10ft deep
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The only thing of interest in this hole was some graffiti possibly dating back to it’s early days
The second hole, smaller in diameter produced little of interest after a couple of hours digging and has been abandoned. This is possibly an escape route from a WW2 post but the original entrance has been lost over time.