A stunning beach closed to visitors for nearly 18 years is set to reopen thanks to campaigning efforts from the local MP.Newhaven West Beach in Sussex, owned by French firm Newhaven Port and Properties, was shut to the public in 2008 on grounds of health and safety risks.The company has maintained the eroded walls along the sandy stretch are "too dangerous" for visitors to access.Now, a parliamentary bill has been launched to compel the owners t…