They can get suspended for many months on full pay, for the sorts of things you would be dismissed for in any company. Theft, misappropriation, corruption, dishonesty. Unfortunately, its a way of sweeping the problem under the carpet.
This is what Amber Rudd, the then Home Secretary said about Cressida Dick,
"Cressida Dick is an exceptional leader, and has a clear vision for the future of the Metropolitan Police and an understanding of the diverse range of communities it serves."
The Home Secretary has today announced that Cressida Dick will be the next Commissioner of the Metropolitan Police.
www.gov.uk
Rather than improving relations with the community during her time as Commissioner, those relations and possibly the conduct of the officers has declined noticeably.