Grass over grown and tree falling into my garden

I have previously reported this issue. The gardens back on to my garden my son has a severe grass and tree allergy. The grass is very over grown and the pear tree allergy the debris is falling in to my garden where my son plays. The trees also further down are extremely overgrownHe has severe allergies to grass and tree pollen and is unable to play outside because of this. I report the same issue each year and Southwark council is fully aware of my son’s allergies.