The position is that the tenancy agreement of 2009 continues to cover the situation in a slightly different form.
By this I mean it becomes a periodic tenancy and it can be terminated in the same way as the 2009 tenancy agreement could have been terminated. This means you would have to be served with notice terminating the tenancy and giving you time to leave. You cannot simply be evicted
As such you are no better or worse off.
The same notice as in the 2009 agreement or, if that is silent on notice, the same period as you pay rent, usually a month as the rent is paid each month.
You are not sitting tenants in the sense that do have a tenancy agreement that has continued to roll over.
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