Vastly overgrown trees

The trees situated in the grounds of what was formerly Freshbrook school, used to be kept to a manageable height, by the Local Council, whilst the school, the playground and school entrance were in constant use. Now, however, the trees have grown as high as our houses, and are severely restricting our gardens. Our lawn is no longer a lawn, just moss and weeds, and the sun does not reach the ends of the gardens of ourselves and our neighbours. Could we please have them cut back to a safer, more reasonable height? Thank you.