Unfortunately a a semi failed attempt as the site is now near totally under water and without scuba gear or at least some very good waders, there was no entrance to the tunnels or any rooms at all. With the extent of flooding we cannot imagine it will ever be accessible.
In the late Victorian period (1889-1903) mobilisation centres were constructed around the London area in order to provide ready ammunition in order to defend the city. These centres were not designed as forts themselves, although they could have been armed if the need arose. Being a mobilisation centre, if the need for armament did become apparent, the North Weald Redoubt would have been armed with whatever guns were seen as appropriate at the time.