I need to move back into my flat that is currently let out due to my relationship ending. The tenancy ends in December but my letting agent has told me that I need to serve a section 21 notice to the tenants in any case, and they will charge me £150 to do this on my behalf. I just wanted to check that this is correct and they’re not just trying to get more money out of me (on top of the £150 check out fee they also charge to check the flat against the inventory etc). Why can’t I just not renew the tenancy when it ends? Many thanks in advance for any advice.