If your neighbour’s tree is creeping into your garden, you do have the right to trim back branches or roots that cross your boundary, but only as far as the line between your properties, and without stepping onto their land.
Anything you cut technically still belongs to your neighbour, so it’s polite (and legally correct) to offer the branches or fruit back before you get rid of them.
It’s also important to check whether the tree is protected by a Tree Preservation Order or sits in a Conservation Area, because in those cases you’ll need council permission before touching it. Be careful not to cause lasting harm — if a tree is damaged or dies because of overzealous pruning, you could end up responsible for compensation.
Sometimes trees are seen as a shared asset between neighbours: a mature tree can add value and beauty to both gardens, while neglect or heavy-handed work can have the opposite effect, even leading to disputes over property value. Overgrown roots and branches can also damage fences or walls, so a calm, practical conversation with your neighbour is usually the best first step. And if the tree is particularly large or awkward, bringing in a qualified tree surgeon keeps things safe and avoids misunderstandings.
If you are unsure or have any questions, do not hesitate to contact your SHA housing officer.