If an individual is stopped and searched by the police, the police have to have “reasonable grounds” to do so. This is an objective test and clearly common sense must be exercised. For example, if there has been a report of burglary and the descriptions are of an Asian male and the individual searched is a white female, clearly the search is unlawful.
The Police do have the power to stop and search anyone under Terrorism legislation and to be stopped and searched mainly happens at the stations and airports. They do have the power to stop and search without having to have grounds.
You can also be stopped and searched under Section 60 of The Criminal Justice & Public Order Act 1994 when an area is designated by the Superintendents being one prone to anti social behaviour or high in crime. (Where a Section 60 is in place, the police do not have to have reasonable grounds). This predominantly applies to young people however, if a young person is continually stopped this may constitute harassment and may give rise to a complaint.
The above is just an example of your rights relating to police powers and Amosu Robinshaw are willing and are able to come in and speak to Community Groups regarding rights of the individual.