It is the threat of turning the thing over, combined with difficulties getting round trees that is making the choice difficult.

A robot mower is not going to work as they have to be able to plug themselves in to recharge, at least the one owned by the bloke next door does. I have the sides of a track to mow as it crosses two fields to get to our house. By the time it got to the far end it would already have had to turn back to plug in again! The one next door forever seems to need reprograming as well.

Robin