We would advise you to consult with your Host to prepare ahead of time and avoid nasty surprises after the move out inspection.
Nevertheless, we list some illustrative costs here, just for your reference, and to set rough expectations of the range of the charges.
Property cleaning: £150-£300+ per property, depending on the size, from 1 to 3 or more bedrooms.
Removal of items you left behind: £10-£100 per item, depending on size of the item, from a small box of shoes, to a large item requiring 2 people to carry it.
Painting: £50 per hour labour cost plus materials.
Lost keys: £30 per metal key, the cost for security access cards and fobs could be more, depending on building staff charges that vary between developments.