We have some really established trees in our garden. We looked at having them taken out completely some time ago but seem to remember the advice then was not to touch established roots as this could cause settlement. The roots however are causing a problem with neighbours' drive. The drive people want to take the trees down and the roots out. We've said ok if we can get it on qualifed authority (not the driveway people) that it won't cause a problem with our house. So who do we ask? Surveyor? Architect? Anyone know?