If the police arrest you and search your house are they responsible for lockign your door and securing your house afterwards? this question is specific to the Uk as i know in the US and other countries they don't necessarily have to.
From the Police and Criminal Evidence Act (PACE) 1984
Code b
Sec (e) Leaving premises
Para: 6.13
If premises have been entered by force, before leaving the officer in charge of the search must make sure they are secure by:
• arranging for the occupier or their agent to be present
• any other appropriate means