Ask an Property Solicitor. Get an Answer ASAP.
Welcome to JA.
Please note that this is not a chat service therefore you may experience delays but rest assured that I will respond within 24 hours.
It is likely your property will be classed as a hmo because its rented out to 3 people that are not from the same family. Whether you require a licence is a decision your council will determine.
Therefore you should contact your local council and they will provide further information regarding whether your home requires a licence.
Please see below a link for further information about the point discussed above.
I hope I have clarified the position if not please let me know.
Thanks and stay safe.