By Alexander Marrow LONDON (Reuters) -The Magnum Ice Cream Company has concluded that the chair of its Ben & Jerry's independent board "no longer meets the criteria" to serve after internal investigations, according to a securities filing late on Tuesday, the latest twist in an internal feud. The spat between Magnum and the Vermont-based Ben & Jerry's brand is heating up as consumer goods conglomerate Unilever prepares for the spinoff of the Magnum ice cream division in early December, which has been del ...