Winning your flutter in this week's Grand National all depends on a string of superstitions and rituals, a survey has revealed. And research shows that if your tip is seventh down the list or the jockey's racing colours are Royal blue, emerald green or red, then you're more likely to return to the bookies and collect a few bob. The world's greatest steeplechase takes place on Saturday at Aintree, which will be watched by a worldwide audience of 600 million with an estimated £500 million being staked globally by punters. Scroll down for video . Four out of ten Britons betting on the Grand National won last year by Pineau De Re, centre, make their choice purely down to the name of the horse while 70 per cent of women admit relying on pot luck . Jockey Sam Twiston Davies, pictured, admitted that he always salutes a magpie on his way to Aintree . Out of 2,000 Britons who confirmed they would be having a bet, 40 per cent of them admitted their selection would be purely down to the name of the horse because it would have struck a chord. A surprising 60 per cent said their secret superstition was to have the same family members gathered around the TV watching the race every year. Others revealed they sit in the same chair and have exactly the same food and drink during the race every time – and even wear the same 'lucky' clothes! When it comes to the big day, the survey – by National sponsors Crabbie's Alcoholic Ginger Beer – showed that a huge 70 per cent of women simply rely on pure chance opposed to 47-per cent of men who try to study form. But, to the bookies' glee, less than 20 per cent of those quizzed said their quirky superstitions actually produced a win. Survey boss Al Cross said: 'It seems most people have some sort of good luck charm. My own ritual is to always pick the well turned-out horse. It's worked for me twice, but I will keep trying.' And leading jump jockey Sam Twiston-Davies added: 'I only have one race ritual, and that is always to salute a magpie!' Saturday's Grand National will be the final time Tony McCoy, pictured on 2010 winner Don't Push It, will 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 .