Some legal/workability difficulties may arise
You cannot run your gate in the lane and obscrure your neighbours wall.
You cannot open your gate out into the lane and obstruct others rights of way.
That's in terms of principles emilbronte, but in real life I have seen both things done.
If the neighbours /laneowners agreed you may be okay.
The sliding gate is either hung on the outer wall from an angle or from a beam over
The opening out gate is securted at the outer face of the wall with exposed hinges
Both of these can be subject to vandal attack or interference from out in the lane.
You also have to think of health and safety issues with big solid gates both in terms of the weight of them and and what could happen if the wind caught them.
An open railed gate for example, while offering little visual security, will be less affected by the wind.
You also have to think about the closing action where little or large fingers could get hurt.
In that sense while electrics are expensive to install and run and can be troublesome [especially if mounted in the ground] they can be linked to a safety cut off if something cross a line.
This shows how safety must be balanced against security - you might actually want the gate to squish the guy who's trying to nip in after you!!!
FWIW
ONQ
[broken link removed]
All advice on AAM is remote from the situation and cannot be relied upon as a defence or support - in and of itself - should legal action be taken.
Competent legal and building professionals should be asked to advise in Real Life with rights to inspect and issue reports on the matters at hand.