At present if a person is in breach of a planning application the local authority has to go through the civil courts to get approval to, for example, have a group of caravans removed from the site. This can take several months to complete. If such a flagrant breah was made a criminal offence then the Police could be called in at once to remove the caravans and arrest the offenders.
Why does this idea matter?
As things stand the law appears to favour the offender rather than the innocent people affected by the planning breach. If such offenders realised they could be arrested, fined and may be locked up they might think twice about offending. The cost to the local authority for enforcing planning decisions would also be reduced.