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The current requirement would be for you to give the person 2 months notice to vacate premises. You would issue a section 21 notice which is essentially a no fault notice for the person to leave the property.
Please see the below link with information with respect to the notice and the information that is to be included in the notice.
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This does not affect any other rights you may have had. This person is not a tenant in the truest sense of the word. So there would be no need for a licence.