Ownership of a lane that runs behind my road

Hi, I'm hoping someone can help! I live on a private road (unadopted) and there is a vehicular no through road lane that runs behind, although there is pedestrian access, so it is very popular with dog walkers. It does eventually lead to an electricity substation. A lot of my neighbours have lived on the road for 40+ years and they still are not sure who owns the lane. There is another residential road (adopted) on the other side of the lane. It is just wide enough to get vehicles down, and I use the lane to access the rear of my property, and for this reason I maintain it from getting overgrown. The 'road' section of the lane has approximately 1 m of land running adjacent before the fence line for our road starts.

Who or where could I contact in order to find out more information? Who owns it, should they be upkeeping it, do we own half of the lane and the adopted road the other half? etc

Certain Sat Navs that delivery drivers use often send trucks down the lane causing awful tree damage.

A quick look on land registry hasn't given any information.
Regards John

Hi John - start with establishing what's registered or not - Search for land and property information - GOV.UK
Only registered information is available online so if in doubt then please submit a postal search of the index map instead to confirm if the land is unregistered
If it's unregistered then our blog offers some thoughts on how to try and identify the legal owner - Searching for the owner of unregistered land – HM Land Registry
I would also recommend seeking legal advice as appropriate with regards your own rights and responsibilities 
If you are looking for wider advice online then online forums such as Garden Law can be useful resources and are much more prone to others sharing their understanding/experience with you