OP,
you say below an attic - do you mean an original attic room or some kind of loft arrangement?
Has the fireplace flue opening been blocked off or is the flue open - no blocking?
Can you post pics of the c/b in the room above, and outside pics showing the chimney stack from front and rear elevations?
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local