Owning your own home

Tell landlord that me might be moving out on 6th bu that we'd need some room around that.
Landlord replies positively.

Then lines up tenants and builders to work as if we're definitely moving out on the 7th now. New tenants could wait until 21st.

Where do I stand legally? Am I fucked?
I asked if he could tell everyone to wait until January, they've said "we now have legal requirement to the tenants".

I'm annoyed.

Does your fixed term tenancy end on the 6th?

And if so has the landlord issued you with a Section 21 notice requesting possession of the property from the 7th?