Who is responsible?
If the blockage is in your home, it is your responsibility to unblock it. You are responsible for the drains that serve your home up to the boundary of your property or to the point where it joins with pipework from another property, whichever is closest.
Our guide to pipework responsibility will help you to check whether the blocked pipe is yours or ours. Remember to check your household insurance if it is your responsibility, as you might be covered for the cost of clearing the blockage.