New to group but fascinated by the thread. Used to live on East Goscote for many years and was involved in the Scouts, Church, School and Parish Council. I'll try and answer some of the points raised by contributors as best I can and chuck in a few 'stories' just to liven the mix.
The building next to the crossing was a signal box, no doubt there to control the movement of trains from the depot onto the main line. It was no longer functioning during the 30 years I lived there but was still used by Network Rail when they came out to repair the automatic barriers, until it was demolished.
The concrete blocks on the playing fields, not sure about hhd two in the bushes but he others between the scout hut and the ozvillion are going to seriously disappoint you. I had to open these up with the parish council caretaker when we were trying to trace cess pits (don't ask!). Once you lift the concrete blocks you have a standard waste drainage access pint about 3 to 4 feet deep with traditional clay water pipes coming into them. No tunnels sorry.
The mounds, about 10 to 15 years ago the Parish council wanted to open up the mounds to create a youth centre for the village (at least it would have been vandal proof!) We applied to the MoD for plans of the bunkers but were told they no longer existed or were lost. We were never able to get plans nor could we obtain planning permission to open them up.
Stories:- read into these what you wish all but the last were village gossip but coming from sources I would trust.
When the scout hut was built no evidence of tunnels was found or hindered it's construction.
Stories: read into these what you will but I trust the sources.
The right hand mound was rumoured to have remained sealed under MoD instructions during Jelsons building works and is said to still contain machinery from the war. (I realise other contributers say they played in both bunkers as children so that debunks this story)
During the 70's the ventilatioshadts on the top of the mounds fell through and gad to be back filled with rubble by the council.
Next to the railway crossing on the village side there was an opening to a tunnel that ran all the way to the station in Syston and was rumoured to be the rail line used for moving munitions. It was sealed up in the kate 70's early 80's to prevent kids abusing it plus a growing problem with rats. Maybe this is the opening referred to as being in someone's grandads back garden.
Finally this came from good friends of my parents. Their father was stationed here when it was decommissioned . His job was to follow the last trucks off the compound with a gender counter to ensure that nothing 'unwanted fell off them. Now there's one for all the conspiracy pundits.
Hope this helps. Would love the stories of tunnels to be true. Only ever found burnt bricks and builders waste in our garden but you never know!
Oh, one of the original houses in the area has a well in their back garden.
Enjoy!