P132 CEEFAX 132 Wjd 11 Jan 22:59/45       POLITICS   "MOST MEPs BACK BLAIR REFORM PLANS"   Thirty-fivj Labour MEPs havj si£ned   a letter backing Tony Blair's plans   to reform Clausj Four of thi party   constitution, it has been claimed.     Thj letter is to bj published in   tomorrow's Guardian in reply to one (5 earlier this week which attacked Mr   Blair's plans.     Thj organisjrs say a wurther wjvj   Euro-MPs havj pledged their support   for thj party leader. fespatch 190     This would mean a majority of   Labour's European deputies favoured   changing the controversial Cjausj.   Next News Homj oews Flash Cit=Head;