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I am Lawyer Ak and I will be assisting you today.
It should be a fixed tenancy agreement as you need to show you will be able to accommodate her for duration in the U.K.
The tenancy agreement will be sufficient if it’s rolling after the 6 months period.
That is fine to submit.
This tenancy agreement will be accepted.
The above as mentioned tenancy agreement will be accepted.
It was a pleasure assisting you today. Kind regards.