London police has a very good reputation. I've never had any dealings with them (despite many visits to London, a nice reflection on how they typically don't bug you without a reason) but from the people that I know that live there in general it seems like they actually take the 'protect and serve' bit to heart, contrary to many other police forces the world over.
Duggan was a self confessed members of a drug dealing gang (Star Gang), was considered dangerous, and had a gun is his car when killed.
The Guardian were rightly forced by the PCC to retract their article that claimed Duggan was 'unarmed' and should feel ashamed of themselves for helping stoke that fire.
That's probably because the UK has far, far, far, far higher standards for its police than the US. Even the worst police in the UK are far better than the police here in the US.
