BETTING RECORD EXPECTED FOR NATIONAL Bookmakers are predicting that betting on tomorrow`s Martell Grand National will top one hundred million pounds for first time. William Hill are expecting that this weekend will see the biggest plunge of all time on the outcome of the Aintree highlight. 'Although the Grand National is always the biggest betting event of the year, this year`s is set to smash all previous records, particularly as we now have internet punters from over 200 different countries logging on to place tax-free bets,' said William Hill spokesman Graham Sharpe. Betting shop punters will contribute the majority of the betting turnover and Hills report plenty of backing for last year`s winner and runner-up Papillon and Mely Moss.