Q.Longleaf fig
I read your interesting and helpful article on logleaf figs on www.gardeningknowhow.com
I inherited this houseplant (please see photos) and am wondering whether it is a Longleaf fig (ficus binnendijkii)? Might you know please?
Secondly, the houseplant has been shedding leaves, since last November, some of which are browning. Do you know what I should do to prevent this? I am doing most of what your article says that I should be doing for the plant (if it is a long leaf fig). The plant is now about 5 foot (167cm). I have been feeding it with Baby bio plant food in Spring.
I would love to hear what your thoughts are?

Yes, it appears you have a Longleaf Fig.
It appears quite healthy, though I do see some spots on the leaves. This could be watering issues and or lack of humidity.
Make sure you are evenly watering and that the soil is not soggy.
Lack of humidity can be corrected by placing the plant on a rock and water tray. You could also add a small plant humidifier in the room.
Here are some links for you.
https://www.gardeningknowhow.com/houseplants/ficus/what-is-a-longleaf-fig-learn-about-longleaf-fig-care.htm
https://www.gardeningknowhow.com/houseplants/hpgen/raise-humidity-for-houseplants.htm