More than 600 million people will wager 40 per cent on Saturday 's race . Four out of ten Britons admit to picking their horse because of the name . Seven out of ten women make their selection for the big race by pot luck . Champion jockey and 2010 winner Tony McCoy will retire after the race .
More than 600 million people will wager £500 million on Saturday 's race . Four out of ten Britons admit to picking their horse because of the name . Seven out of ten women make their selection for the big race by pot luck . Champion jockey and 2010 winner Tony McCoy will retire after the race .