They are now heavily involved in a team's tactical play - drawing in the press, luring in the opposition and opening space further up the pitch for their team-mates to exploit.

As he was watching on TV, he later told me, Williams thought he recognized the patch on a rioter’s tactical vest.

Dutchman Slot, who joined from Feyenoord in the summer, has also implemented a more measured tactical approach.

Jaabir Booly, a third-year paramedic science student at the university, said after he graduated he hoped to work in London with a tactical response unit or in urgent care.

A group of rowdy fans hanging around afterward were ushered from the parade route by officers in tactical gear marching in formation.