This fireplace is suspect.
It has been boarded over and has not been used for some time. It is very sooty and probably congested. It may be a health risk. The flue needs sweeping and your fireplace contractor should undertake a simple smoke test to ensure it is working properly.
In an older property where you are intending to install an appliance such as a gas fire or log burning/multifuel stove the flue will need fully lining for energy efficiency and health and safety reasons.
You can find out more at www.hetas.co.uk ir www.gassaferegister.co.uk.