Plod right in....

....and sit right down.

http://www.bbc.co.uk/news/uk-england-coventry-warwickshire-35400694

Coppers just entering peoples' homes to prove a point.
What happens if they find something while in there, do they have to turn a blind eye since they entered unlawfully unless after somebody without a warrant?
Surely if this were allowed theyd just spend all day trying suspected criminals front doors.