Hedge trimming can take place anytime of the year within the curtilage of a residential property . BUT you can not disturb nesting birds. Large removals need to take place in the winter.
Yes, all the green waste that is produced in the works is removed from site and recycled at a licensed green waste site
Most common hedge types are cut twice a year. Mid summer after the fast growth in spring and then again in the winter when they are dormant.
