We live in an end terrace house which has an access track to the side and back of the garden. The track is very overgrown at the back - the side section is clear as it also leads to some garages, but the section along the back is so overgrown there are massive trees in it and we have to trim back the bramble to stop it coming over our 6ft fence. It has clearly not been used for any kind of access for a very long time.
New neighbour wants to clear and use part of the access track as an extension of his garden. Surely he can't do this? I'm not entirely sure who owns access tracks - our houses are 1930s and the side section of the track also serves the houses round the corner on a different street. If he extends his garden, he's blocking the access of one of his neighbours (albeit in theory only, as it's not currently accessible due to trees/bramble). Does anyone have any suggestions?