How effectively can an English employer restrict an employee's activity after the employment ends?

Essay from the year 2009 in the subject Business economics - Law, grade: 1,7, Schmalkalden University of Applied Sciences, language: English, abstract: If an employee change his emploeyer, there is the danger, that the ex-employee takes the company secrets and other interesting and confidential information with itself away to his new employer, who is very likely a competitor of the ex-employer or ...