Unfortunately,the flat has an issue with condensation and mould,there was a dehumidifier in the flat,which we used every day. During our stay,the black mould was in the bedroom living space walls and behind the window shutters.Fortunately,in our final week the owner,visited the flat with another dehumidifier and window dehumidifiers.All the mould was removed and the flat was deep cleaned. The owner gave us some flowers and a bottle of wine.I felt it was necessary to share photos of the mould with Airbnb. Immediately, Airbnb reimbursed me with the cost of the cleaning, for our stay.The NHS states where there is poor ventilation this can cause mould, which we experienced.Mould can trigger serious implications for .My sister and I had a persistent cough and cold and we both feel this was due to the mould causing our immune system to be weaker.For those who are concerned,I shall post pictures of the mould on a GuestReady review.