I think you you might just be blowing off some steam with your comment, but i found it interesing.

I found a quote on this: American police need probable cause to make an arrest, but in the United Kingdom, officers can arrest on suspicion. Probable cause is defined as the belief that a crime was probably committed, and that the suspect was probably responsible. Reasonable suspicion means that a right-minded individual would have grounds to suspect that a crime had been committed and that the suspect might be responsible. To have probable cause, greater evidence is required.

Being arrested on suspicion in the U.K. isn’t so unpleasant as being arrested in the U.S. In fact, you’re likely to be released within hours without paying any bail.

http://www.slate.com/articles/news_and_politics/explainer/20...