The Metropolitan police have been granted special powers to tackle violence as the south and east London teams meet again on Saturday after 14 years Absence has not made the heart grow fonder. Millwall and West Ham meet for the first time in 14 years on Saturday, but it is not going to be a joyous reunion at the Den. The atmosphere will be ferocious and the main hope is that the focus is on the football rather than any nonsense away from the pitch. These two have plenty of previous, even though…