Want to be a nice & flexible tenant and say "hey, don't worry about cleaning that, I'm happy with it as is". Prepare to get screwed out of your entire security deposit by their ridiculous cleaning fees--cleaning fees for things left by the previous tenant. I've never met a more miserly landlord. Prepare to have your ceiling fall in and get a lackadaisical response, with no one showing up for weeks while you look at an ugly hole.
It's a shame because the letting agent was nice. Their move out policies are awful and probably borderline illegal, taking no account for normal wear and tear. Enjoy the security deposit, maybe you can buy yourself a mug that says "world's most thieving landlords". Caveat emptor read more