End of lease 2 bed flat clean including oven

We are moving out of a leased flat in Sevenoaks, near the station. It needs the normal thorough, professional, end-of-lease clean. There is an oven which needs a clean too, and it is on the first floor so there is a staircase that needs cleaning as well I send some pictures/video if the site lets me - these show some items in the flat, but we'll remove those before the clean. The flat is quite large as two-bed flats go, but it is not very dirty, imho. Nick