hi. i have what im told are several sycamores growing up the side border of my garden. im not even sure they are sycamores as i thought sycamores were trees but these are growing branches at ground level and are more like bushes. They have obviously seeded there and were not deliberately planted.

anyway ive tried cutting back as much as possible but the branches/shoots just seem to have gone berserk now and i think ive made them worse.

short of getting a chain saw out and lobbing the lot down is there anything else i can do to get rid of these or at least keep them under control?

thanks