How to kill brambles?

There was another thread on this recently. Don't just cut them back, that will encourage them. They are growing vigorously at the moment (I have some amazing specimens in my front garden!). It is not a quick job getting rid of them, you need patience!

I have doused them with systemic weedkiller, then when they show signs of dying back I will give them a couple of weeks, then cut them down just to tidy them. They will probably come back next year, but not as vigorous. Repeat the douse and leave procedure. After a couple of years all the root will have been treated and they will stop growing.

It is most important to leave them after they have been treated for the weedkiller to get down into the roots, it needs at least a couple of weeks. If they are not looking sick at that stage you could give them another go, but do it before the end of the summer, once they start to go dormant they will not carry the weedkiller back to the roots.