Argentina v Australia: Bet £10 and get £40 in free bets with William Hill World champions Argentina are back in international action this weekend as they take on Australia in China on Thursday afternoon for a friendly. And William Hill are now offering all new customers £40 in free bets when they bet £10 on mobile on any of the action, which they can claim here. 1 New William Hill mobile sign up offer. WILLIAM HILL – Bet £10 on mobile and get £40 in free bets – CLAIM HERE* The friendly will take place at the Workers' Stadium in…