Merger twins Granada, down 1/2p at 115 1/2p, and Carlton Communications, off 3p at 213 3/4p, came under increased pressure from institutional shareholders which are objecting to Michael Green, boss of Carlton, being appointed chairman of the enlarged company. Ten institutions, accounting for almost half of both companies' shares, want Green's head on a platter by tomorrow. But the Carlton board is resisting and institutions are likely to press for an extraordinary general meeting.