Private clients of Brewin Dolphin have been asked to vote in favour of a €1.2 billion management buyout of Irish Continental Group after a significant number of them previously either voted against the deal or did not vote at all.  Clients of the stockbroker have been given until the close of Wednesday to decide if they wish to change their vote amid an intense campaign by the management of ICG to convince shareholders to back the deal.  The move comes as Oxy Capital, a 1.4% shareholder in ICG, published another letter on Monday criticising the MBO bid as “materially” undervaluing…