Trimmming Poplars

Hi
I moved into a house a few years ago and inherited some trees. Now I have no idea about gardening but I have 6 Poplars at the end of the garden and the neighbours are getting worried that they may come crashing down.
The highest ones are around 35 feet and now don�t offer much privacy as they did before.
They look as though they�ve been trimmed quite harshly at some time and the trunks don�t look that thick is this something I can tackle or should I call a professional

thanks

db

 

Only you know if you can tackle something like this. Have you done anything like it before and have you got anybody who can give you a hand.
If your not confident then call in the experts, someone who has insurance.