A similar thread below made me think about our situation. 2 bought houses. New neighbours move in and a note through door asks if we would consider cutting our trees to maximise the light they will have in their garden. Bearing in mind they were on holiday during the sunny times we had. They even said they would help. I overheard them in the garden getting estimates for planning to build an extension. Obviously this will take up more space and light in their garden. Are they unreasonable to expect us to change our garden to suit them. They bought the house knowing where the trees were.